Home / 724,156.40-1,086,234.60-388,233.20

Finding the Fourth Proportional to 724,156.40, 1,086,234.60 and 388,233.20

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Solution

The fourth proportional to 724,156.40, 1,086,234.60 and 388,233.20 is: 582,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,156.40 : 1,086,234.60 = 388,233.20 : x
  2. Step 2: Convert to fraction form
    724,156.40/1,086,234.60 = 388,233.20/x
  3. Step 3: Cross multiply
    724,156.40x = 1,086,234.60 × 388,233.20
  4. Step 4: Simplify right side
    724,156.40x = 421,712,334,708.72
  5. Step 5: Solve for x
    x = 421,712,334,708.72/724,156.40
  6. Step 6: Final answer
    x = 582,349.80

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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.