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Finding the Fourth Proportional to 666,359.73, 999,538.77 and 217,079.85

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Solution

The fourth proportional to 666,359.73, 999,538.77 and 217,079.85 is: 325,619.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,359.73 : 999,538.77 = 217,079.85 : x
  2. Step 2: Convert to fraction form
    666,359.73/999,538.77 = 217,079.85/x
  3. Step 3: Cross multiply
    666,359.73x = 999,538.77 × 217,079.85
  4. Step 4: Simplify right side
    666,359.73x = 216,979,726,260.79
  5. Step 5: Solve for x
    x = 216,979,726,260.79/666,359.73
  6. Step 6: Final answer
    x = 325,619.51

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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.