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Finding the Fourth Proportional to 532.95, 735.47 and 311.86

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Solution

The fourth proportional to 532.95, 735.47 and 311.86 is: 430.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.95 : 735.47 = 311.86 : x
  2. Step 2: Convert to fraction form
    532.95/735.47 = 311.86/x
  3. Step 3: Cross multiply
    532.95x = 735.47 × 311.86
  4. Step 4: Simplify right side
    532.95x = 229,363.67
  5. Step 5: Solve for x
    x = 229,363.67/532.95
  6. Step 6: Final answer
    x = 430.37

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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.