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Finding the Fourth Proportional to 531.92, 799.70 and 491.82

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Solution

The fourth proportional to 531.92, 799.70 and 491.82 is: 739.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.92 : 799.70 = 491.82 : x
  2. Step 2: Convert to fraction form
    531.92/799.70 = 491.82/x
  3. Step 3: Cross multiply
    531.92x = 799.70 × 491.82
  4. Step 4: Simplify right side
    531.92x = 393,305.99
  5. Step 5: Solve for x
    x = 393,305.99/531.92
  6. Step 6: Final answer
    x = 739.42

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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.