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Finding the Fourth Proportional to 642,857.01, 964,420.37 and 243,488.94

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Solution

The fourth proportional to 642,857.01, 964,420.37 and 243,488.94 is: 365,284.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,857.01 : 964,420.37 = 243,488.94 : x
  2. Step 2: Convert to fraction form
    642,857.01/964,420.37 = 243,488.94/x
  3. Step 3: Cross multiply
    642,857.01x = 964,420.37 × 243,488.94
  4. Step 4: Simplify right side
    642,857.01x = 234,825,691,054.40
  5. Step 5: Solve for x
    x = 234,825,691,054.40/642,857.01
  6. Step 6: Final answer
    x = 365,284.49

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Double scale
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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.