Home / 638,125.20-957,187.80-319,260.60

Finding the Fourth Proportional to 638,125.20, 957,187.80 and 319,260.60

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Solution

The fourth proportional to 638,125.20, 957,187.80 and 319,260.60 is: 478,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,125.20 : 957,187.80 = 319,260.60 : x
  2. Step 2: Convert to fraction form
    638,125.20/957,187.80 = 319,260.60/x
  3. Step 3: Cross multiply
    638,125.20x = 957,187.80 × 319,260.60
  4. Step 4: Simplify right side
    638,125.20x = 305,592,351,340.68
  5. Step 5: Solve for x
    x = 305,592,351,340.68/638,125.20
  6. Step 6: Final answer
    x = 478,890.90

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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.