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Finding the Fourth Proportional to 937.81, 1,407.03 and 418.17

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Solution

The fourth proportional to 937.81, 1,407.03 and 418.17 is: 627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.81 : 1,407.03 = 418.17 : x
  2. Step 2: Convert to fraction form
    937.81/1,407.03 = 418.17/x
  3. Step 3: Cross multiply
    937.81x = 1,407.03 × 418.17
  4. Step 4: Simplify right side
    937.81x = 588,377.74
  5. Step 5: Solve for x
    x = 588,377.74/937.81
  6. Step 6: Final answer
    x = 627.40

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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.