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Finding the Fourth Proportional to 476.91, 715.67 and 426.17

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Solution

The fourth proportional to 476.91, 715.67 and 426.17 is: 639.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.91 : 715.67 = 426.17 : x
  2. Step 2: Convert to fraction form
    476.91/715.67 = 426.17/x
  3. Step 3: Cross multiply
    476.91x = 715.67 × 426.17
  4. Step 4: Simplify right side
    476.91x = 304,997.08
  5. Step 5: Solve for x
    x = 304,997.08/476.91
  6. Step 6: Final answer
    x = 639.53

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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.