Home / 1,280,318.52-1,766,058.74-821,278.56

Finding the Fourth Proportional to 1,280,318.52, 1,766,058.74 and 821,278.56

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Solution

The fourth proportional to 1,280,318.52, 1,766,058.74 and 821,278.56 is: 1,132,863.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,318.52 : 1,766,058.74 = 821,278.56 : x
  2. Step 2: Convert to fraction form
    1,280,318.52/1,766,058.74 = 821,278.56/x
  3. Step 3: Cross multiply
    1,280,318.52x = 1,766,058.74 × 821,278.56
  4. Step 4: Simplify right side
    1,280,318.52x = 1,450,426,178,862.61
  5. Step 5: Solve for x
    x = 1,450,426,178,862.61/1,280,318.52
  6. Step 6: Final answer
    x = 1,132,863.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.