Home / 852,078.60-1,278,117.90-431,299.80

Finding the Fourth Proportional to 852,078.60, 1,278,117.90 and 431,299.80

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Solution

The fourth proportional to 852,078.60, 1,278,117.90 and 431,299.80 is: 646,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,078.60 : 1,278,117.90 = 431,299.80 : x
  2. Step 2: Convert to fraction form
    852,078.60/1,278,117.90 = 431,299.80/x
  3. Step 3: Cross multiply
    852,078.60x = 1,278,117.90 × 431,299.80
  4. Step 4: Simplify right side
    852,078.60x = 551,251,994,646.42
  5. Step 5: Solve for x
    x = 551,251,994,646.42/852,078.60
  6. Step 6: Final answer
    x = 646,949.70

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Half scale
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Double scale
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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.