Home / 852,088.60-1,278,132.90-431,309.80

Finding the Fourth Proportional to 852,088.60, 1,278,132.90 and 431,309.80

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Solution

The fourth proportional to 852,088.60, 1,278,132.90 and 431,309.80 is: 646,964.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,088.60 : 1,278,132.90 = 431,309.80 : x
  2. Step 2: Convert to fraction form
    852,088.60/1,278,132.90 = 431,309.80/x
  3. Step 3: Cross multiply
    852,088.60x = 1,278,132.90 × 431,309.80
  4. Step 4: Simplify right side
    852,088.60x = 551,271,245,472.42
  5. Step 5: Solve for x
    x = 551,271,245,472.42/852,088.60
  6. Step 6: Final answer
    x = 646,964.70

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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.