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Finding the Fourth Proportional to 531.54, 799.13 and 491.45

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Solution

The fourth proportional to 531.54, 799.13 and 491.45 is: 738.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.54 : 799.13 = 491.45 : x
  2. Step 2: Convert to fraction form
    531.54/799.13 = 491.45/x
  3. Step 3: Cross multiply
    531.54x = 799.13 × 491.45
  4. Step 4: Simplify right side
    531.54x = 392,729.67
  5. Step 5: Solve for x
    x = 392,729.67/531.54
  6. Step 6: Final answer
    x = 738.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.