Home / 724,205.40-1,086,308.10-388,282.20

Finding the Fourth Proportional to 724,205.40, 1,086,308.10 and 388,282.20

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Solution

The fourth proportional to 724,205.40, 1,086,308.10 and 388,282.20 is: 582,423.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,205.40 : 1,086,308.10 = 388,282.20 : x
  2. Step 2: Convert to fraction form
    724,205.40/1,086,308.10 = 388,282.20/x
  3. Step 3: Cross multiply
    724,205.40x = 1,086,308.10 × 388,282.20
  4. Step 4: Simplify right side
    724,205.40x = 421,794,098,945.82
  5. Step 5: Solve for x
    x = 421,794,098,945.82/724,205.40
  6. Step 6: Final answer
    x = 582,423.30

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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.