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Finding the Fourth Proportional to 1,279,948.97, 1,766,311.66 and 699,165.15

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Solution

The fourth proportional to 1,279,948.97, 1,766,311.66 and 699,165.15 is: 964,838.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,948.97 : 1,766,311.66 = 699,165.15 : x
  2. Step 2: Convert to fraction form
    1,279,948.97/1,766,311.66 = 699,165.15/x
  3. Step 3: Cross multiply
    1,279,948.97x = 1,766,311.66 × 699,165.15
  4. Step 4: Simplify right side
    1,279,948.97x = 1,234,943,556,710.65
  5. Step 5: Solve for x
    x = 1,234,943,556,710.65/1,279,948.97
  6. Step 6: Final answer
    x = 964,838.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.