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Finding the Fourth Proportional to 531.55, 737.68 and 518.50

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Solution

The fourth proportional to 531.55, 737.68 and 518.50 is: 719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.55 : 737.68 = 518.50 : x
  2. Step 2: Convert to fraction form
    531.55/737.68 = 518.50/x
  3. Step 3: Cross multiply
    531.55x = 737.68 × 518.50
  4. Step 4: Simplify right side
    531.55x = 382,487.08
  5. Step 5: Solve for x
    x = 382,487.08/531.55
  6. Step 6: Final answer
    x = 719.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.