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Finding the Fourth Proportional to 621.92, 928.72 and 585.92

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Solution

The fourth proportional to 621.92, 928.72 and 585.92 is: 874.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.92 : 928.72 = 585.92 : x
  2. Step 2: Convert to fraction form
    621.92/928.72 = 585.92/x
  3. Step 3: Cross multiply
    621.92x = 928.72 × 585.92
  4. Step 4: Simplify right side
    621.92x = 544,155.62
  5. Step 5: Solve for x
    x = 544,155.62/621.92
  6. Step 6: Final answer
    x = 874.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.