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Finding the Fourth Proportional to 482.87, 724.34 and 136.21

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Solution

The fourth proportional to 482.87, 724.34 and 136.21 is: 204.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.87 : 724.34 = 136.21 : x
  2. Step 2: Convert to fraction form
    482.87/724.34 = 136.21/x
  3. Step 3: Cross multiply
    482.87x = 724.34 × 136.21
  4. Step 4: Simplify right side
    482.87x = 98,662.35
  5. Step 5: Solve for x
    x = 98,662.35/482.87
  6. Step 6: Final answer
    x = 204.32

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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.