Home / 839,875.20-1,259,812.80-278,909.70

Finding the Fourth Proportional to 839,875.20, 1,259,812.80 and 278,909.70

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Solution

The fourth proportional to 839,875.20, 1,259,812.80 and 278,909.70 is: 418,364.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,875.20 : 1,259,812.80 = 278,909.70 : x
  2. Step 2: Convert to fraction form
    839,875.20/1,259,812.80 = 278,909.70/x
  3. Step 3: Cross multiply
    839,875.20x = 1,259,812.80 × 278,909.70
  4. Step 4: Simplify right side
    839,875.20x = 351,374,010,104.16
  5. Step 5: Solve for x
    x = 351,374,010,104.16/839,875.20
  6. Step 6: Final answer
    x = 418,364.55

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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.