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Finding the Fourth Proportional to 665,751.90, 998,682.81 and 216,462.54

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Solution

The fourth proportional to 665,751.90, 998,682.81 and 216,462.54 is: 324,711.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,751.90 : 998,682.81 = 216,462.54 : x
  2. Step 2: Convert to fraction form
    665,751.90/998,682.81 = 216,462.54/x
  3. Step 3: Cross multiply
    665,751.90x = 998,682.81 × 216,462.54
  4. Step 4: Simplify right side
    665,751.90x = 216,177,417,706.94
  5. Step 5: Solve for x
    x = 216,177,417,706.94/665,751.90
  6. Step 6: Final answer
    x = 324,711.68

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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.