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Finding the Fourth Proportional to 398,885.36, 598,438.76 and 221,516.93

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Solution

The fourth proportional to 398,885.36, 598,438.76 and 221,516.93 is: 332,336.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,885.36 : 598,438.76 = 221,516.93 : x
  2. Step 2: Convert to fraction form
    398,885.36/598,438.76 = 221,516.93/x
  3. Step 3: Cross multiply
    398,885.36x = 598,438.76 × 221,516.93
  4. Step 4: Simplify right side
    398,885.36x = 132,564,314,553.52
  5. Step 5: Solve for x
    x = 132,564,314,553.52/398,885.36
  6. Step 6: Final answer
    x = 332,336.88

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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.