Home / 858,879.60-1,288,319.40-780,147.60

Finding the Fourth Proportional to 858,879.60, 1,288,319.40 and 780,147.60

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Solution

The fourth proportional to 858,879.60, 1,288,319.40 and 780,147.60 is: 1,170,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,879.60 : 1,288,319.40 = 780,147.60 : x
  2. Step 2: Convert to fraction form
    858,879.60/1,288,319.40 = 780,147.60/x
  3. Step 3: Cross multiply
    858,879.60x = 1,288,319.40 × 780,147.60
  4. Step 4: Simplify right side
    858,879.60x = 1,005,079,287,943.44
  5. Step 5: Solve for x
    x = 1,005,079,287,943.44/858,879.60
  6. Step 6: Final answer
    x = 1,170,221.40

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1.5x scale

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.