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Finding the Fourth Proportional to 458,302.60, 687,453.90 and 125,912.20

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Solution

The fourth proportional to 458,302.60, 687,453.90 and 125,912.20 is: 188,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,302.60 : 687,453.90 = 125,912.20 : x
  2. Step 2: Convert to fraction form
    458,302.60/687,453.90 = 125,912.20/x
  3. Step 3: Cross multiply
    458,302.60x = 687,453.90 × 125,912.20
  4. Step 4: Simplify right side
    458,302.60x = 86,558,832,947.58
  5. Step 5: Solve for x
    x = 86,558,832,947.58/458,302.60
  6. Step 6: Final answer
    x = 188,868.30

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Similar ratio
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1.5x scale

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.