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Finding the Fourth Proportional to 665,903.31, 998,864.16 and 216,626.53

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Solution

The fourth proportional to 665,903.31, 998,864.16 and 216,626.53 is: 324,942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,903.31 : 998,864.16 = 216,626.53 : x
  2. Step 2: Convert to fraction form
    665,903.31/998,864.16 = 216,626.53/x
  3. Step 3: Cross multiply
    665,903.31x = 998,864.16 × 216,626.53
  4. Step 4: Simplify right side
    665,903.31x = 216,380,476,922.17
  5. Step 5: Solve for x
    x = 216,380,476,922.17/665,903.31
  6. Step 6: Final answer
    x = 324,942.79

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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.