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Finding the Fourth Proportional to 411.77, 616.08 and 279.47

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Solution

The fourth proportional to 411.77, 616.08 and 279.47 is: 418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.77 : 616.08 = 279.47 : x
  2. Step 2: Convert to fraction form
    411.77/616.08 = 279.47/x
  3. Step 3: Cross multiply
    411.77x = 616.08 × 279.47
  4. Step 4: Simplify right side
    411.77x = 172,175.88
  5. Step 5: Solve for x
    x = 172,175.88/411.77
  6. Step 6: Final answer
    x = 418.14

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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.