Home / 1,280,087.80-1,920,131.70-808,862.20

Finding the Fourth Proportional to 1,280,087.80, 1,920,131.70 and 808,862.20

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Solution

The fourth proportional to 1,280,087.80, 1,920,131.70 and 808,862.20 is: 1,213,293.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,087.80 : 1,920,131.70 = 808,862.20 : x
  2. Step 2: Convert to fraction form
    1,280,087.80/1,920,131.70 = 808,862.20/x
  3. Step 3: Cross multiply
    1,280,087.80x = 1,920,131.70 × 808,862.20
  4. Step 4: Simplify right side
    1,280,087.80x = 1,553,121,951,151.74
  5. Step 5: Solve for x
    x = 1,553,121,951,151.74/1,280,087.80
  6. Step 6: Final answer
    x = 1,213,293.30

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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.