Home / 852,139.60-1,278,209.40-431,360.80

Finding the Fourth Proportional to 852,139.60, 1,278,209.40 and 431,360.80

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Solution

The fourth proportional to 852,139.60, 1,278,209.40 and 431,360.80 is: 647,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,139.60 : 1,278,209.40 = 431,360.80 : x
  2. Step 2: Convert to fraction form
    852,139.60/1,278,209.40 = 431,360.80/x
  3. Step 3: Cross multiply
    852,139.60x = 1,278,209.40 × 431,360.80
  4. Step 4: Simplify right side
    852,139.60x = 551,369,429,351.52
  5. Step 5: Solve for x
    x = 551,369,429,351.52/852,139.60
  6. Step 6: Final answer
    x = 647,041.20

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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.