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Finding the Fourth Proportional to 477.13, 715.06 and 392.65

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Solution

The fourth proportional to 477.13, 715.06 and 392.65 is: 588.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.13 : 715.06 = 392.65 : x
  2. Step 2: Convert to fraction form
    477.13/715.06 = 392.65/x
  3. Step 3: Cross multiply
    477.13x = 715.06 × 392.65
  4. Step 4: Simplify right side
    477.13x = 280,766.35
  5. Step 5: Solve for x
    x = 280,766.35/477.13
  6. Step 6: Final answer
    x = 588.45

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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.