Home / 979,840.60-1,469,760.90-418,931.80

Finding the Fourth Proportional to 979,840.60, 1,469,760.90 and 418,931.80

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Solution

The fourth proportional to 979,840.60, 1,469,760.90 and 418,931.80 is: 628,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,840.60 : 1,469,760.90 = 418,931.80 : x
  2. Step 2: Convert to fraction form
    979,840.60/1,469,760.90 = 418,931.80/x
  3. Step 3: Cross multiply
    979,840.60x = 1,469,760.90 × 418,931.80
  4. Step 4: Simplify right side
    979,840.60x = 615,729,579,406.62
  5. Step 5: Solve for x
    x = 615,729,579,406.62/979,840.60
  6. Step 6: Final answer
    x = 628,397.70

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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.