Home / 858,759.20-1,288,138.80-699,326.90

Finding the Fourth Proportional to 858,759.20, 1,288,138.80 and 699,326.90

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Solution

The fourth proportional to 858,759.20, 1,288,138.80 and 699,326.90 is: 1,048,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,759.20 : 1,288,138.80 = 699,326.90 : x
  2. Step 2: Convert to fraction form
    858,759.20/1,288,138.80 = 699,326.90/x
  3. Step 3: Cross multiply
    858,759.20x = 1,288,138.80 × 699,326.90
  4. Step 4: Simplify right side
    858,759.20x = 900,830,113,773.72
  5. Step 5: Solve for x
    x = 900,830,113,773.72/858,759.20
  6. Step 6: Final answer
    x = 1,048,990.35

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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.