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Finding the Fourth Proportional to 616.74, 926.04 and 387.09

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Solution

The fourth proportional to 616.74, 926.04 and 387.09 is: 581.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.74 : 926.04 = 387.09 : x
  2. Step 2: Convert to fraction form
    616.74/926.04 = 387.09/x
  3. Step 3: Cross multiply
    616.74x = 926.04 × 387.09
  4. Step 4: Simplify right side
    616.74x = 358,454.26
  5. Step 5: Solve for x
    x = 358,454.26/616.74
  6. Step 6: Final answer
    x = 581.21

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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.