Home / 876,121.20-1,312,626.60-543,308.40

Finding the Fourth Proportional to 876,121.20, 1,312,626.60 and 543,308.40

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Solution

The fourth proportional to 876,121.20, 1,312,626.60 and 543,308.40 is: 813,998.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,121.20 : 1,312,626.60 = 543,308.40 : x
  2. Step 2: Convert to fraction form
    876,121.20/1,312,626.60 = 543,308.40/x
  3. Step 3: Cross multiply
    876,121.20x = 1,312,626.60 × 543,308.40
  4. Step 4: Simplify right side
    876,121.20x = 713,161,057,843.44
  5. Step 5: Solve for x
    x = 713,161,057,843.44/876,121.20
  6. Step 6: Final answer
    x = 813,998.17

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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.