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Finding the Fourth Proportional to 532.65, 735.17 and 311.79

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Solution

The fourth proportional to 532.65, 735.17 and 311.79 is: 430.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.65 : 735.17 = 311.79 : x
  2. Step 2: Convert to fraction form
    532.65/735.17 = 311.79/x
  3. Step 3: Cross multiply
    532.65x = 735.17 × 311.79
  4. Step 4: Simplify right side
    532.65x = 229,217.10
  5. Step 5: Solve for x
    x = 229,217.10/532.65
  6. Step 6: Final answer
    x = 430.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.