Home / 1,206,543.60-1,809,815.40-781,390.80

Finding the Fourth Proportional to 1,206,543.60, 1,809,815.40 and 781,390.80

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Solution

The fourth proportional to 1,206,543.60, 1,809,815.40 and 781,390.80 is: 1,172,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,543.60 : 1,809,815.40 = 781,390.80 : x
  2. Step 2: Convert to fraction form
    1,206,543.60/1,809,815.40 = 781,390.80/x
  3. Step 3: Cross multiply
    1,206,543.60x = 1,809,815.40 × 781,390.80
  4. Step 4: Simplify right side
    1,206,543.60x = 1,414,173,103,258.32
  5. Step 5: Solve for x
    x = 1,414,173,103,258.32/1,206,543.60
  6. Step 6: Final answer
    x = 1,172,086.20

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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.