Home / 810,112.80-1,215,169.20-389,287.20

Finding the Fourth Proportional to 810,112.80, 1,215,169.20 and 389,287.20

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Solution

The fourth proportional to 810,112.80, 1,215,169.20 and 389,287.20 is: 583,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,112.80 : 1,215,169.20 = 389,287.20 : x
  2. Step 2: Convert to fraction form
    810,112.80/1,215,169.20 = 389,287.20/x
  3. Step 3: Cross multiply
    810,112.80x = 1,215,169.20 × 389,287.20
  4. Step 4: Simplify right side
    810,112.80x = 473,049,815,394.24
  5. Step 5: Solve for x
    x = 473,049,815,394.24/810,112.80
  6. Step 6: Final answer
    x = 583,930.80

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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.