Home / 852,089.60-1,278,134.40-431,310.80

Finding the Fourth Proportional to 852,089.60, 1,278,134.40 and 431,310.80

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Solution

The fourth proportional to 852,089.60, 1,278,134.40 and 431,310.80 is: 646,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,089.60 : 1,278,134.40 = 431,310.80 : x
  2. Step 2: Convert to fraction form
    852,089.60/1,278,134.40 = 431,310.80/x
  3. Step 3: Cross multiply
    852,089.60x = 1,278,134.40 × 431,310.80
  4. Step 4: Simplify right side
    852,089.60x = 551,273,170,571.52
  5. Step 5: Solve for x
    x = 551,273,170,571.52/852,089.60
  6. Step 6: Final answer
    x = 646,966.20

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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.