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Finding the Fourth Proportional to 506.56, 759.98 and 458.38

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Solution

The fourth proportional to 506.56, 759.98 and 458.38 is: 687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.56 : 759.98 = 458.38 : x
  2. Step 2: Convert to fraction form
    506.56/759.98 = 458.38/x
  3. Step 3: Cross multiply
    506.56x = 759.98 × 458.38
  4. Step 4: Simplify right side
    506.56x = 348,359.63
  5. Step 5: Solve for x
    x = 348,359.63/506.56
  6. Step 6: Final answer
    x = 687.70

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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.