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Finding the Fourth Proportional to 626.55, 938.70 and 497.40

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Solution

The fourth proportional to 626.55, 938.70 and 497.40 is: 745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.55 : 938.70 = 497.40 : x
  2. Step 2: Convert to fraction form
    626.55/938.70 = 497.40/x
  3. Step 3: Cross multiply
    626.55x = 938.70 × 497.40
  4. Step 4: Simplify right side
    626.55x = 466,909.38
  5. Step 5: Solve for x
    x = 466,909.38/626.55
  6. Step 6: Final answer
    x = 745.21

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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.