Home / 1,291,716.80-1,936,700.40-660,111.20

Finding the Fourth Proportional to 1,291,716.80, 1,936,700.40 and 660,111.20

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Solution

The fourth proportional to 1,291,716.80, 1,936,700.40 and 660,111.20 is: 989,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,716.80 : 1,936,700.40 = 660,111.20 : x
  2. Step 2: Convert to fraction form
    1,291,716.80/1,936,700.40 = 660,111.20/x
  3. Step 3: Cross multiply
    1,291,716.80x = 1,936,700.40 × 660,111.20
  4. Step 4: Simplify right side
    1,291,716.80x = 1,278,437,625,084.48
  5. Step 5: Solve for x
    x = 1,278,437,625,084.48/1,291,716.80
  6. Step 6: Final answer
    x = 989,719.75

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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.