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Finding the Fourth Proportional to 458.71, 688.87 and 356.11

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Solution

The fourth proportional to 458.71, 688.87 and 356.11 is: 534.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.71 : 688.87 = 356.11 : x
  2. Step 2: Convert to fraction form
    458.71/688.87 = 356.11/x
  3. Step 3: Cross multiply
    458.71x = 688.87 × 356.11
  4. Step 4: Simplify right side
    458.71x = 245,313.50
  5. Step 5: Solve for x
    x = 245,313.50/458.71
  6. Step 6: Final answer
    x = 534.79

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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.