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Finding the Fourth Proportional to 681,570.80, 1,022,404.80 and 208,255.40

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Solution

The fourth proportional to 681,570.80, 1,022,404.80 and 208,255.40 is: 312,397.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,570.80 : 1,022,404.80 = 208,255.40 : x
  2. Step 2: Convert to fraction form
    681,570.80/1,022,404.80 = 208,255.40/x
  3. Step 3: Cross multiply
    681,570.80x = 1,022,404.80 × 208,255.40
  4. Step 4: Simplify right side
    681,570.80x = 212,921,320,585.92
  5. Step 5: Solve for x
    x = 212,921,320,585.92/681,570.80
  6. Step 6: Final answer
    x = 312,397.95

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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.