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Finding the Fourth Proportional to 578,728.40, 868,092.60 and 381,736.40

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Solution

The fourth proportional to 578,728.40, 868,092.60 and 381,736.40 is: 572,604.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,728.40 : 868,092.60 = 381,736.40 : x
  2. Step 2: Convert to fraction form
    578,728.40/868,092.60 = 381,736.40/x
  3. Step 3: Cross multiply
    578,728.40x = 868,092.60 × 381,736.40
  4. Step 4: Simplify right side
    578,728.40x = 331,382,543,990.64
  5. Step 5: Solve for x
    x = 331,382,543,990.64/578,728.40
  6. Step 6: Final answer
    x = 572,604.60

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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.