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Finding the Fourth Proportional to 531.20, 731.50 and 383.58

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Solution

The fourth proportional to 531.20, 731.50 and 383.58 is: 528.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.20 : 731.50 = 383.58 : x
  2. Step 2: Convert to fraction form
    531.20/731.50 = 383.58/x
  3. Step 3: Cross multiply
    531.20x = 731.50 × 383.58
  4. Step 4: Simplify right side
    531.20x = 280,588.77
  5. Step 5: Solve for x
    x = 280,588.77/531.20
  6. Step 6: Final answer
    x = 528.22

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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.