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Finding the Fourth Proportional to 665,388.81, 998,369.15 and 216,247.32

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Solution

The fourth proportional to 665,388.81, 998,369.15 and 216,247.32 is: 324,463.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,388.81 : 998,369.15 = 216,247.32 : x
  2. Step 2: Convert to fraction form
    665,388.81/998,369.15 = 216,247.32/x
  3. Step 3: Cross multiply
    665,388.81x = 998,369.15 × 216,247.32
  4. Step 4: Simplify right side
    665,388.81x = 215,894,651,976.94
  5. Step 5: Solve for x
    x = 215,894,651,976.94/665,388.81
  6. Step 6: Final answer
    x = 324,463.91

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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.