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Finding the Fourth Proportional to 2,939.99, 4,057.17 and 1,613.71

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Solution

The fourth proportional to 2,939.99, 4,057.17 and 1,613.71 is: 2,226.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.99 : 4,057.17 = 1,613.71 : x
  2. Step 2: Convert to fraction form
    2,939.99/4,057.17 = 1,613.71/x
  3. Step 3: Cross multiply
    2,939.99x = 4,057.17 × 1,613.71
  4. Step 4: Simplify right side
    2,939.99x = 6,547,095.80
  5. Step 5: Solve for x
    x = 6,547,095.80/2,939.99
  6. Step 6: Final answer
    x = 2,226.91

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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.