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Finding the Fourth Proportional to 666,248.87, 999,443.31 and 217,004.72

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Solution

The fourth proportional to 666,248.87, 999,443.31 and 217,004.72 is: 325,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,248.87 : 999,443.31 = 217,004.72 : x
  2. Step 2: Convert to fraction form
    666,248.87/999,443.31 = 217,004.72/x
  3. Step 3: Cross multiply
    666,248.87x = 999,443.31 × 217,004.72
  4. Step 4: Simplify right side
    666,248.87x = 216,883,915,642.42
  5. Step 5: Solve for x
    x = 216,883,915,642.42/666,248.87
  6. Step 6: Final answer
    x = 325,529.88

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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.