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Finding the Fourth Proportional to 578,760.60, 868,140.90 and 204,821.40

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Solution

The fourth proportional to 578,760.60, 868,140.90 and 204,821.40 is: 307,232.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,760.60 : 868,140.90 = 204,821.40 : x
  2. Step 2: Convert to fraction form
    578,760.60/868,140.90 = 204,821.40/x
  3. Step 3: Cross multiply
    578,760.60x = 868,140.90 × 204,821.40
  4. Step 4: Simplify right side
    578,760.60x = 177,813,834,535.26
  5. Step 5: Solve for x
    x = 177,813,834,535.26/578,760.60
  6. Step 6: Final answer
    x = 307,232.10

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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.