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Finding the Fourth Proportional to 666,717.21, 1,000,107.99 and 217,437.48

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Solution

The fourth proportional to 666,717.21, 1,000,107.99 and 217,437.48 is: 326,166.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,717.21 : 1,000,107.99 = 217,437.48 : x
  2. Step 2: Convert to fraction form
    666,717.21/1,000,107.99 = 217,437.48/x
  3. Step 3: Cross multiply
    666,717.21x = 1,000,107.99 × 217,437.48
  4. Step 4: Simplify right side
    666,717.21x = 217,460,961,073.47
  5. Step 5: Solve for x
    x = 217,460,961,073.47/666,717.21
  6. Step 6: Final answer
    x = 326,166.71

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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.