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Finding the Fourth Proportional to 482.49, 724.64 and 318.11

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Solution

The fourth proportional to 482.49, 724.64 and 318.11 is: 477.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.49 : 724.64 = 318.11 : x
  2. Step 2: Convert to fraction form
    482.49/724.64 = 318.11/x
  3. Step 3: Cross multiply
    482.49x = 724.64 × 318.11
  4. Step 4: Simplify right side
    482.49x = 230,510.02
  5. Step 5: Solve for x
    x = 230,510.02/482.49
  6. Step 6: Final answer
    x = 477.75

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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.