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Finding the Fourth Proportional to 482.65, 724.08 and 238.89

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Solution

The fourth proportional to 482.65, 724.08 and 238.89 is: 358.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.65 : 724.08 = 238.89 : x
  2. Step 2: Convert to fraction form
    482.65/724.08 = 238.89/x
  3. Step 3: Cross multiply
    482.65x = 724.08 × 238.89
  4. Step 4: Simplify right side
    482.65x = 172,975.47
  5. Step 5: Solve for x
    x = 172,975.47/482.65
  6. Step 6: Final answer
    x = 358.39

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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.