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Finding the Fourth Proportional to 638,179.70, 957,269.55 and 520,081.70

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Solution

The fourth proportional to 638,179.70, 957,269.55 and 520,081.70 is: 780,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,179.70 : 957,269.55 = 520,081.70 : x
  2. Step 2: Convert to fraction form
    638,179.70/957,269.55 = 520,081.70/x
  3. Step 3: Cross multiply
    638,179.70x = 957,269.55 × 520,081.70
  4. Step 4: Simplify right side
    638,179.70x = 497,858,374,922.24
  5. Step 5: Solve for x
    x = 497,858,374,922.24/638,179.70
  6. Step 6: Final answer
    x = 780,122.55

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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.