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Finding the Fourth Proportional to 488.17, 730.52 and 391.29

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Solution

The fourth proportional to 488.17, 730.52 and 391.29 is: 585.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.17 : 730.52 = 391.29 : x
  2. Step 2: Convert to fraction form
    488.17/730.52 = 391.29/x
  3. Step 3: Cross multiply
    488.17x = 730.52 × 391.29
  4. Step 4: Simplify right side
    488.17x = 285,847.42
  5. Step 5: Solve for x
    x = 285,847.42/488.17
  6. Step 6: Final answer
    x = 585.55

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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.