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Finding the Fourth Proportional to 501.52, 752.46 and 318.85

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Solution

The fourth proportional to 501.52, 752.46 and 318.85 is: 478.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.52 : 752.46 = 318.85 : x
  2. Step 2: Convert to fraction form
    501.52/752.46 = 318.85/x
  3. Step 3: Cross multiply
    501.52x = 752.46 × 318.85
  4. Step 4: Simplify right side
    501.52x = 239,921.87
  5. Step 5: Solve for x
    x = 239,921.87/501.52
  6. Step 6: Final answer
    x = 478.39

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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.