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Finding the Fourth Proportional to 487.60, 730.71 and 256.03

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Solution

The fourth proportional to 487.60, 730.71 and 256.03 is: 383.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.60 : 730.71 = 256.03 : x
  2. Step 2: Convert to fraction form
    487.60/730.71 = 256.03/x
  3. Step 3: Cross multiply
    487.60x = 730.71 × 256.03
  4. Step 4: Simplify right side
    487.60x = 187,081.85
  5. Step 5: Solve for x
    x = 187,081.85/487.60
  6. Step 6: Final answer
    x = 383.68

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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.