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Finding the Fourth Proportional to 666,147.43, 999,275.82 and 216,748.09

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Solution

The fourth proportional to 666,147.43, 999,275.82 and 216,748.09 is: 325,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,147.43 : 999,275.82 = 216,748.09 : x
  2. Step 2: Convert to fraction form
    666,147.43/999,275.82 = 216,748.09/x
  3. Step 3: Cross multiply
    666,147.43x = 999,275.82 × 216,748.09
  4. Step 4: Simplify right side
    666,147.43x = 216,591,125,368.18
  5. Step 5: Solve for x
    x = 216,591,125,368.18/666,147.43
  6. Step 6: Final answer
    x = 325,139.92

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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.