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Finding the Fourth Proportional to 487.59, 730.99 and 243.78

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Solution

The fourth proportional to 487.59, 730.99 and 243.78 is: 365.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.59 : 730.99 = 243.78 : x
  2. Step 2: Convert to fraction form
    487.59/730.99 = 243.78/x
  3. Step 3: Cross multiply
    487.59x = 730.99 × 243.78
  4. Step 4: Simplify right side
    487.59x = 178,200.74
  5. Step 5: Solve for x
    x = 178,200.74/487.59
  6. Step 6: Final answer
    x = 365.47

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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.