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Finding the Fourth Proportional to 887,854.80, 1,331,879.40 and 859,861.20

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Solution

The fourth proportional to 887,854.80, 1,331,879.40 and 859,861.20 is: 1,289,885.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,854.80 : 1,331,879.40 = 859,861.20 : x
  2. Step 2: Convert to fraction form
    887,854.80/1,331,879.40 = 859,861.20/x
  3. Step 3: Cross multiply
    887,854.80x = 1,331,879.40 × 859,861.20
  4. Step 4: Simplify right side
    887,854.80x = 1,145,231,419,139.28
  5. Step 5: Solve for x
    x = 1,145,231,419,139.28/887,854.80
  6. Step 6: Final answer
    x = 1,289,885.94

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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.