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Finding the Fourth Proportional to 616.14, 849.64 and 476.28

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Solution

The fourth proportional to 616.14, 849.64 and 476.28 is: 656.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.14 : 849.64 = 476.28 : x
  2. Step 2: Convert to fraction form
    616.14/849.64 = 476.28/x
  3. Step 3: Cross multiply
    616.14x = 849.64 × 476.28
  4. Step 4: Simplify right side
    616.14x = 404,666.54
  5. Step 5: Solve for x
    x = 404,666.54/616.14
  6. Step 6: Final answer
    x = 656.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.