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Finding the Fourth Proportional to 777,868.80, 1,165,420.80 and 667,276.80

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Solution

The fourth proportional to 777,868.80, 1,165,420.80 and 667,276.80 is: 999,729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,868.80 : 1,165,420.80 = 667,276.80 : x
  2. Step 2: Convert to fraction form
    777,868.80/1,165,420.80 = 667,276.80/x
  3. Step 3: Cross multiply
    777,868.80x = 1,165,420.80 × 667,276.80
  4. Step 4: Simplify right side
    777,868.80x = 777,658,262,077.44
  5. Step 5: Solve for x
    x = 777,658,262,077.44/777,868.80
  6. Step 6: Final answer
    x = 999,729.34

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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.