Home / 861,947.28-1,189,487.21-499,581.36

Finding the Fourth Proportional to 861,947.28, 1,189,487.21 and 499,581.36

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Solution

The fourth proportional to 861,947.28, 1,189,487.21 and 499,581.36 is: 689,422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,947.28 : 1,189,487.21 = 499,581.36 : x
  2. Step 2: Convert to fraction form
    861,947.28/1,189,487.21 = 499,581.36/x
  3. Step 3: Cross multiply
    861,947.28x = 1,189,487.21 × 499,581.36
  4. Step 4: Simplify right side
    861,947.28x = 594,245,635,576.50
  5. Step 5: Solve for x
    x = 594,245,635,576.50/861,947.28
  6. Step 6: Final answer
    x = 689,422.25

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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.