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Finding the Fourth Proportional to 3,572.92, 4,930.67 and 1,979.62

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Solution

The fourth proportional to 3,572.92, 4,930.67 and 1,979.62 is: 2,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.92 : 4,930.67 = 1,979.62 : x
  2. Step 2: Convert to fraction form
    3,572.92/4,930.67 = 1,979.62/x
  3. Step 3: Cross multiply
    3,572.92x = 4,930.67 × 1,979.62
  4. Step 4: Simplify right side
    3,572.92x = 9,760,852.95
  5. Step 5: Solve for x
    x = 9,760,852.95/3,572.92
  6. Step 6: Final answer
    x = 2,731.90

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1.5x scale

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.