Home / 815,541.32-1,222,638.45-359,807.78

Finding the Fourth Proportional to 815,541.32, 1,222,638.45 and 359,807.78

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Solution

The fourth proportional to 815,541.32, 1,222,638.45 and 359,807.78 is: 539,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,541.32 : 1,222,638.45 = 359,807.78 : x
  2. Step 2: Convert to fraction form
    815,541.32/1,222,638.45 = 359,807.78/x
  3. Step 3: Cross multiply
    815,541.32x = 1,222,638.45 × 359,807.78
  4. Step 4: Simplify right side
    815,541.32x = 439,914,820,323.95
  5. Step 5: Solve for x
    x = 439,914,820,323.95/815,541.32
  6. Step 6: Final answer
    x = 539,414.51

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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.