Home / 1,087,761.80-1,631,642.70-687,103.40

Finding the Fourth Proportional to 1,087,761.80, 1,631,642.70 and 687,103.40

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Solution

The fourth proportional to 1,087,761.80, 1,631,642.70 and 687,103.40 is: 1,030,655.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087,761.80 : 1,631,642.70 = 687,103.40 : x
  2. Step 2: Convert to fraction form
    1,087,761.80/1,631,642.70 = 687,103.40/x
  3. Step 3: Cross multiply
    1,087,761.80x = 1,631,642.70 × 687,103.40
  4. Step 4: Simplify right side
    1,087,761.80x = 1,121,107,246,755.18
  5. Step 5: Solve for x
    x = 1,121,107,246,755.18/1,087,761.80
  6. Step 6: Final answer
    x = 1,030,655.10

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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.