Home / 639,983.85-883,160.78-353,497.79

Finding the Fourth Proportional to 639,983.85, 883,160.78 and 353,497.79

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Solution

The fourth proportional to 639,983.85, 883,160.78 and 353,497.79 is: 487,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,983.85 : 883,160.78 = 353,497.79 : x
  2. Step 2: Convert to fraction form
    639,983.85/883,160.78 = 353,497.79/x
  3. Step 3: Cross multiply
    639,983.85x = 883,160.78 × 353,497.79
  4. Step 4: Simplify right side
    639,983.85x = 312,195,377,761.38
  5. Step 5: Solve for x
    x = 312,195,377,761.38/639,983.85
  6. Step 6: Final answer
    x = 487,817.59

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.