Home / 728,121.80-1,092,182.70-665,136.20

Finding the Fourth Proportional to 728,121.80, 1,092,182.70 and 665,136.20

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Solution

The fourth proportional to 728,121.80, 1,092,182.70 and 665,136.20 is: 997,704.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,121.80 : 1,092,182.70 = 665,136.20 : x
  2. Step 2: Convert to fraction form
    728,121.80/1,092,182.70 = 665,136.20/x
  3. Step 3: Cross multiply
    728,121.80x = 1,092,182.70 × 665,136.20
  4. Step 4: Simplify right side
    728,121.80x = 726,450,250,783.74
  5. Step 5: Solve for x
    x = 726,450,250,783.74/728,121.80
  6. Step 6: Final answer
    x = 997,704.30

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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.