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Finding the Fourth Proportional to 476.92, 715.60 and 217.10

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Solution

The fourth proportional to 476.92, 715.60 and 217.10 is: 325.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.92 : 715.60 = 217.10 : x
  2. Step 2: Convert to fraction form
    476.92/715.60 = 217.10/x
  3. Step 3: Cross multiply
    476.92x = 715.60 × 217.10
  4. Step 4: Simplify right side
    476.92x = 155,356.76
  5. Step 5: Solve for x
    x = 155,356.76/476.92
  6. Step 6: Final answer
    x = 325.75

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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.