Home / 725,132.40-1,087,698.60-389,209.20

Finding the Fourth Proportional to 725,132.40, 1,087,698.60 and 389,209.20

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Solution

The fourth proportional to 725,132.40, 1,087,698.60 and 389,209.20 is: 583,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,132.40 : 1,087,698.60 = 389,209.20 : x
  2. Step 2: Convert to fraction form
    725,132.40/1,087,698.60 = 389,209.20/x
  3. Step 3: Cross multiply
    725,132.40x = 1,087,698.60 × 389,209.20
  4. Step 4: Simplify right side
    725,132.40x = 423,342,301,947.12
  5. Step 5: Solve for x
    x = 423,342,301,947.12/725,132.40
  6. Step 6: Final answer
    x = 583,813.80

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Double scale
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Similar ratio
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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.