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Finding the Fourth Proportional to 532.85, 735.21 and 385.70

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Solution

The fourth proportional to 532.85, 735.21 and 385.70 is: 532.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.85 : 735.21 = 385.70 : x
  2. Step 2: Convert to fraction form
    532.85/735.21 = 385.70/x
  3. Step 3: Cross multiply
    532.85x = 735.21 × 385.70
  4. Step 4: Simplify right side
    532.85x = 283,566.82
  5. Step 5: Solve for x
    x = 283,566.82/532.85
  6. Step 6: Final answer
    x = 532.18

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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.