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Finding the Fourth Proportional to 500.67, 749.91 and 317.61

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Solution

The fourth proportional to 500.67, 749.91 and 317.61 is: 475.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.67 : 749.91 = 317.61 : x
  2. Step 2: Convert to fraction form
    500.67/749.91 = 317.61/x
  3. Step 3: Cross multiply
    500.67x = 749.91 × 317.61
  4. Step 4: Simplify right side
    500.67x = 238,178.92
  5. Step 5: Solve for x
    x = 238,178.92/500.67
  6. Step 6: Final answer
    x = 475.72

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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.