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Finding the Fourth Proportional to 991,907.40, 1,487,861.10 and 243,953.40

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Solution

The fourth proportional to 991,907.40, 1,487,861.10 and 243,953.40 is: 365,930.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,907.40 : 1,487,861.10 = 243,953.40 : x
  2. Step 2: Convert to fraction form
    991,907.40/1,487,861.10 = 243,953.40/x
  3. Step 3: Cross multiply
    991,907.40x = 1,487,861.10 × 243,953.40
  4. Step 4: Simplify right side
    991,907.40x = 362,968,774,072.74
  5. Step 5: Solve for x
    x = 362,968,774,072.74/991,907.40
  6. Step 6: Final answer
    x = 365,930.10

Related Problems

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Half scale
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Double scale
Find fourth proportional to 991,908.40, 1,487,862.60 and 243,954.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.