Home / 579,816.60-869,724.90-280,440.60

Finding the Fourth Proportional to 579,816.60, 869,724.90 and 280,440.60

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Solution

The fourth proportional to 579,816.60, 869,724.90 and 280,440.60 is: 420,660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,816.60 : 869,724.90 = 280,440.60 : x
  2. Step 2: Convert to fraction form
    579,816.60/869,724.90 = 280,440.60/x
  3. Step 3: Cross multiply
    579,816.60x = 869,724.90 × 280,440.60
  4. Step 4: Simplify right side
    579,816.60x = 243,906,172,790.94
  5. Step 5: Solve for x
    x = 243,906,172,790.94/579,816.60
  6. Step 6: Final answer
    x = 420,660.90

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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.