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Finding the Fourth Proportional to 3,572.42, 4,929.98 and 1,979.12

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Solution

The fourth proportional to 3,572.42, 4,929.98 and 1,979.12 is: 2,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.42 : 4,929.98 = 1,979.12 : x
  2. Step 2: Convert to fraction form
    3,572.42/4,929.98 = 1,979.12/x
  3. Step 3: Cross multiply
    3,572.42x = 4,929.98 × 1,979.12
  4. Step 4: Simplify right side
    3,572.42x = 9,756,987.47
  5. Step 5: Solve for x
    x = 9,756,987.47/3,572.42
  6. Step 6: Final answer
    x = 2,731.20

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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.