Home / 840,680.60-1,259,635.80-485,074.40

Finding the Fourth Proportional to 840,680.60, 1,259,635.80 and 485,074.40

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Solution

The fourth proportional to 840,680.60, 1,259,635.80 and 485,074.40 is: 726,812.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,680.60 : 1,259,635.80 = 485,074.40 : x
  2. Step 2: Convert to fraction form
    840,680.60/1,259,635.80 = 485,074.40/x
  3. Step 3: Cross multiply
    840,680.60x = 1,259,635.80 × 485,074.40
  4. Step 4: Simplify right side
    840,680.60x = 611,017,079,903.52
  5. Step 5: Solve for x
    x = 611,017,079,903.52/840,680.60
  6. Step 6: Final answer
    x = 726,812.39

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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.