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Finding the Fourth Proportional to 743.49, 1,115.10 and 250.11

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Solution

The fourth proportional to 743.49, 1,115.10 and 250.11 is: 375.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.49 : 1,115.10 = 250.11 : x
  2. Step 2: Convert to fraction form
    743.49/1,115.10 = 250.11/x
  3. Step 3: Cross multiply
    743.49x = 1,115.10 × 250.11
  4. Step 4: Simplify right side
    743.49x = 278,897.66
  5. Step 5: Solve for x
    x = 278,897.66/743.49
  6. Step 6: Final answer
    x = 375.12

Related Problems

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Half scale
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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.