Home / 858,747.60-1,288,121.40-660,070.80

Finding the Fourth Proportional to 858,747.60, 1,288,121.40 and 660,070.80

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Solution

The fourth proportional to 858,747.60, 1,288,121.40 and 660,070.80 is: 990,106.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,747.60 : 1,288,121.40 = 660,070.80 : x
  2. Step 2: Convert to fraction form
    858,747.60/1,288,121.40 = 660,070.80/x
  3. Step 3: Cross multiply
    858,747.60x = 1,288,121.40 × 660,070.80
  4. Step 4: Simplify right side
    858,747.60x = 850,251,322,995.12
  5. Step 5: Solve for x
    x = 850,251,322,995.12/858,747.60
  6. Step 6: Final answer
    x = 990,106.20

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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.