Home / 1,278,979.20-1,921,838.40-710,812.80

Finding the Fourth Proportional to 1,278,979.20, 1,921,838.40 and 710,812.80

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Solution

The fourth proportional to 1,278,979.20, 1,921,838.40 and 710,812.80 is: 1,068,091.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,979.20 : 1,921,838.40 = 710,812.80 : x
  2. Step 2: Convert to fraction form
    1,278,979.20/1,921,838.40 = 710,812.80/x
  3. Step 3: Cross multiply
    1,278,979.20x = 1,921,838.40 × 710,812.80
  4. Step 4: Simplify right side
    1,278,979.20x = 1,366,067,334,251.52
  5. Step 5: Solve for x
    x = 1,366,067,334,251.52/1,278,979.20
  6. Step 6: Final answer
    x = 1,068,091.91

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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.