Home / 638,764.56-881,557.38-477,339.30

Finding the Fourth Proportional to 638,764.56, 881,557.38 and 477,339.30

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Solution

The fourth proportional to 638,764.56, 881,557.38 and 477,339.30 is: 658,774.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,764.56 : 881,557.38 = 477,339.30 : x
  2. Step 2: Convert to fraction form
    638,764.56/881,557.38 = 477,339.30/x
  3. Step 3: Cross multiply
    638,764.56x = 881,557.38 × 477,339.30
  4. Step 4: Simplify right side
    638,764.56x = 420,801,982,679.03
  5. Step 5: Solve for x
    x = 420,801,982,679.03/638,764.56
  6. Step 6: Final answer
    x = 658,774.78

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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.