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Finding the Fourth Proportional to 476.92, 715.40 and 216.88

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Solution

The fourth proportional to 476.92, 715.40 and 216.88 is: 325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.92 : 715.40 = 216.88 : x
  2. Step 2: Convert to fraction form
    476.92/715.40 = 216.88/x
  3. Step 3: Cross multiply
    476.92x = 715.40 × 216.88
  4. Step 4: Simplify right side
    476.92x = 155,155.95
  5. Step 5: Solve for x
    x = 155,155.95/476.92
  6. Step 6: Final answer
    x = 325.33

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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.