Home / 1,438,286.40-2,158,207.20-639,691.20

Finding the Fourth Proportional to 1,438,286.40, 2,158,207.20 and 639,691.20

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Solution

The fourth proportional to 1,438,286.40, 2,158,207.20 and 639,691.20 is: 959,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,286.40 : 2,158,207.20 = 639,691.20 : x
  2. Step 2: Convert to fraction form
    1,438,286.40/2,158,207.20 = 639,691.20/x
  3. Step 3: Cross multiply
    1,438,286.40x = 2,158,207.20 × 639,691.20
  4. Step 4: Simplify right side
    1,438,286.40x = 1,380,586,153,616.64
  5. Step 5: Solve for x
    x = 1,380,586,153,616.64/1,438,286.40
  6. Step 6: Final answer
    x = 959,882.64

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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.