Home / 1,287,131.80-1,930,697.70-815,906.20

Finding the Fourth Proportional to 1,287,131.80, 1,930,697.70 and 815,906.20

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Solution

The fourth proportional to 1,287,131.80, 1,930,697.70 and 815,906.20 is: 1,223,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,131.80 : 1,930,697.70 = 815,906.20 : x
  2. Step 2: Convert to fraction form
    1,287,131.80/1,930,697.70 = 815,906.20/x
  3. Step 3: Cross multiply
    1,287,131.80x = 1,930,697.70 × 815,906.20
  4. Step 4: Simplify right side
    1,287,131.80x = 1,575,268,223,755.74
  5. Step 5: Solve for x
    x = 1,575,268,223,755.74/1,287,131.80
  6. Step 6: Final answer
    x = 1,223,859.30

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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.