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Finding the Fourth Proportional to 517.84, 775.80 and 487.68

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Solution

The fourth proportional to 517.84, 775.80 and 487.68 is: 730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.84 : 775.80 = 487.68 : x
  2. Step 2: Convert to fraction form
    517.84/775.80 = 487.68/x
  3. Step 3: Cross multiply
    517.84x = 775.80 × 487.68
  4. Step 4: Simplify right side
    517.84x = 378,342.14
  5. Step 5: Solve for x
    x = 378,342.14/517.84
  6. Step 6: Final answer
    x = 730.62

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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.