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Finding the Fourth Proportional to 3,139.72, 4,333.38 and 2,983.08

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Solution

The fourth proportional to 3,139.72, 4,333.38 and 2,983.08 is: 4,117.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.72 : 4,333.38 = 2,983.08 : x
  2. Step 2: Convert to fraction form
    3,139.72/4,333.38 = 2,983.08/x
  3. Step 3: Cross multiply
    3,139.72x = 4,333.38 × 2,983.08
  4. Step 4: Simplify right side
    3,139.72x = 12,926,819.21
  5. Step 5: Solve for x
    x = 12,926,819.21/3,139.72
  6. Step 6: Final answer
    x = 4,117.19

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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.