Home / 2,165,139.71-2,988,115.20-1,247,403.42

Finding the Fourth Proportional to 2,165,139.71, 2,988,115.20 and 1,247,403.42

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Solution

The fourth proportional to 2,165,139.71, 2,988,115.20 and 1,247,403.42 is: 1,721,544.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165,139.71 : 2,988,115.20 = 1,247,403.42 : x
  2. Step 2: Convert to fraction form
    2,165,139.71/2,988,115.20 = 1,247,403.42/x
  3. Step 3: Cross multiply
    2,165,139.71x = 2,988,115.20 × 1,247,403.42
  4. Step 4: Simplify right side
    2,165,139.71x = 3,727,385,119,833.98
  5. Step 5: Solve for x
    x = 3,727,385,119,833.98/2,165,139.71
  6. Step 6: Final answer
    x = 1,721,544.86

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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.