Home / 1,279,042.40-1,914,877.20-781,378.40

Finding the Fourth Proportional to 1,279,042.40, 1,914,877.20 and 781,378.40

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Solution

The fourth proportional to 1,279,042.40, 1,914,877.20 and 781,378.40 is: 1,169,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,042.40 : 1,914,877.20 = 781,378.40 : x
  2. Step 2: Convert to fraction form
    1,279,042.40/1,914,877.20 = 781,378.40/x
  3. Step 3: Cross multiply
    1,279,042.40x = 1,914,877.20 × 781,378.40
  4. Step 4: Simplify right side
    1,279,042.40x = 1,496,243,682,732.48
  5. Step 5: Solve for x
    x = 1,496,243,682,732.48/1,279,042.40
  6. Step 6: Final answer
    x = 1,169,815.55

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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.