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Finding the Fourth Proportional to 911,486.80, 1,367,230.20 and 858,998.80

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Solution

The fourth proportional to 911,486.80, 1,367,230.20 and 858,998.80 is: 1,288,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,486.80 : 1,367,230.20 = 858,998.80 : x
  2. Step 2: Convert to fraction form
    911,486.80/1,367,230.20 = 858,998.80/x
  3. Step 3: Cross multiply
    911,486.80x = 1,367,230.20 × 858,998.80
  4. Step 4: Simplify right side
    911,486.80x = 1,174,449,101,123.76
  5. Step 5: Solve for x
    x = 1,174,449,101,123.76/911,486.80
  6. Step 6: Final answer
    x = 1,288,498.20

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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.