Home / 728,124.80-1,092,187.20-409,260.20

Finding the Fourth Proportional to 728,124.80, 1,092,187.20 and 409,260.20

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Solution

The fourth proportional to 728,124.80, 1,092,187.20 and 409,260.20 is: 613,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,124.80 : 1,092,187.20 = 409,260.20 : x
  2. Step 2: Convert to fraction form
    728,124.80/1,092,187.20 = 409,260.20/x
  3. Step 3: Cross multiply
    728,124.80x = 1,092,187.20 × 409,260.20
  4. Step 4: Simplify right side
    728,124.80x = 446,988,751,909.44
  5. Step 5: Solve for x
    x = 446,988,751,909.44/728,124.80
  6. Step 6: Final answer
    x = 613,890.30

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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.