Home / 1,240,531.20-1,861,120.80-399,103.20

Finding the Fourth Proportional to 1,240,531.20, 1,861,120.80 and 399,103.20

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Solution

The fourth proportional to 1,240,531.20, 1,861,120.80 and 399,103.20 is: 598,759.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,531.20 : 1,861,120.80 = 399,103.20 : x
  2. Step 2: Convert to fraction form
    1,240,531.20/1,861,120.80 = 399,103.20/x
  3. Step 3: Cross multiply
    1,240,531.20x = 1,861,120.80 × 399,103.20
  4. Step 4: Simplify right side
    1,240,531.20x = 742,779,266,866.56
  5. Step 5: Solve for x
    x = 742,779,266,866.56/1,240,531.20
  6. Step 6: Final answer
    x = 598,759.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.