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Finding the Fourth Proportional to 476.71, 715.07 and 216.56

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Solution

The fourth proportional to 476.71, 715.07 and 216.56 is: 324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.71 : 715.07 = 216.56 : x
  2. Step 2: Convert to fraction form
    476.71/715.07 = 216.56/x
  3. Step 3: Cross multiply
    476.71x = 715.07 × 216.56
  4. Step 4: Simplify right side
    476.71x = 154,857.89
  5. Step 5: Solve for x
    x = 154,857.89/476.71
  6. Step 6: Final answer
    x = 324.85

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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.