Home / 639,986.28-883,164.12-353,500.20

Finding the Fourth Proportional to 639,986.28, 883,164.12 and 353,500.20

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Solution

The fourth proportional to 639,986.28, 883,164.12 and 353,500.20 is: 487,820.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,986.28 : 883,164.12 = 353,500.20 : x
  2. Step 2: Convert to fraction form
    639,986.28/883,164.12 = 353,500.20/x
  3. Step 3: Cross multiply
    639,986.28x = 883,164.12 × 353,500.20
  4. Step 4: Simplify right side
    639,986.28x = 312,198,693,052.82
  5. Step 5: Solve for x
    x = 312,198,693,052.82/639,986.28
  6. Step 6: Final answer
    x = 487,820.92

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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.