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Finding the Fourth Proportional to 532.81, 735.28 and 311.89

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Solution

The fourth proportional to 532.81, 735.28 and 311.89 is: 430.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.81 : 735.28 = 311.89 : x
  2. Step 2: Convert to fraction form
    532.81/735.28 = 311.89/x
  3. Step 3: Cross multiply
    532.81x = 735.28 × 311.89
  4. Step 4: Simplify right side
    532.81x = 229,326.48
  5. Step 5: Solve for x
    x = 229,326.48/532.81
  6. Step 6: Final answer
    x = 430.41

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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.