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Finding the Fourth Proportional to 737.47, 1,017.71 and 405.90

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Solution

The fourth proportional to 737.47, 1,017.71 and 405.90 is: 560.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.47 : 1,017.71 = 405.90 : x
  2. Step 2: Convert to fraction form
    737.47/1,017.71 = 405.90/x
  3. Step 3: Cross multiply
    737.47x = 1,017.71 × 405.90
  4. Step 4: Simplify right side
    737.47x = 413,082.39
  5. Step 5: Solve for x
    x = 413,082.39/737.47
  6. Step 6: Final answer
    x = 560.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.