Home / 815,478.80-1,223,218.20-647,517.20

Finding the Fourth Proportional to 815,478.80, 1,223,218.20 and 647,517.20

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Solution

The fourth proportional to 815,478.80, 1,223,218.20 and 647,517.20 is: 971,275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,478.80 : 1,223,218.20 = 647,517.20 : x
  2. Step 2: Convert to fraction form
    815,478.80/1,223,218.20 = 647,517.20/x
  3. Step 3: Cross multiply
    815,478.80x = 1,223,218.20 × 647,517.20
  4. Step 4: Simplify right side
    815,478.80x = 792,054,823,853.04
  5. Step 5: Solve for x
    x = 792,054,823,853.04/815,478.80
  6. Step 6: Final answer
    x = 971,275.80

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Double scale
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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.