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Finding the Fourth Proportional to 692,127.90, 955,138.86 and 386,198.73

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Solution

The fourth proportional to 692,127.90, 955,138.86 and 386,198.73 is: 532,955.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,127.90 : 955,138.86 = 386,198.73 : x
  2. Step 2: Convert to fraction form
    692,127.90/955,138.86 = 386,198.73/x
  3. Step 3: Cross multiply
    692,127.90x = 955,138.86 × 386,198.73
  4. Step 4: Simplify right side
    692,127.90x = 368,873,414,705.65
  5. Step 5: Solve for x
    x = 368,873,414,705.65/692,127.90
  6. Step 6: Final answer
    x = 532,955.56

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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.