Home / 639,872.20-960,002.70-359,201.80

Finding the Fourth Proportional to 639,872.20, 960,002.70 and 359,201.80

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Solution

The fourth proportional to 639,872.20, 960,002.70 and 359,201.80 is: 538,911.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,872.20 : 960,002.70 = 359,201.80 : x
  2. Step 2: Convert to fraction form
    639,872.20/960,002.70 = 359,201.80/x
  3. Step 3: Cross multiply
    639,872.20x = 960,002.70 × 359,201.80
  4. Step 4: Simplify right side
    639,872.20x = 344,834,697,844.86
  5. Step 5: Solve for x
    x = 344,834,697,844.86/639,872.20
  6. Step 6: Final answer
    x = 538,911.83

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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.