Home / 1,291,796.80-1,936,820.40-660,191.20

Finding the Fourth Proportional to 1,291,796.80, 1,936,820.40 and 660,191.20

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Solution

The fourth proportional to 1,291,796.80, 1,936,820.40 and 660,191.20 is: 989,839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,796.80 : 1,936,820.40 = 660,191.20 : x
  2. Step 2: Convert to fraction form
    1,291,796.80/1,936,820.40 = 660,191.20/x
  3. Step 3: Cross multiply
    1,291,796.80x = 1,936,820.40 × 660,191.20
  4. Step 4: Simplify right side
    1,291,796.80x = 1,278,671,784,060.48
  5. Step 5: Solve for x
    x = 1,278,671,784,060.48/1,291,796.80
  6. Step 6: Final answer
    x = 989,839.72

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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.