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Finding the Fourth Proportional to 408,058.60, 612,087.90 and 221,434.60

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Solution

The fourth proportional to 408,058.60, 612,087.90 and 221,434.60 is: 332,151.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,058.60 : 612,087.90 = 221,434.60 : x
  2. Step 2: Convert to fraction form
    408,058.60/612,087.90 = 221,434.60/x
  3. Step 3: Cross multiply
    408,058.60x = 612,087.90 × 221,434.60
  4. Step 4: Simplify right side
    408,058.60x = 135,537,439,301.34
  5. Step 5: Solve for x
    x = 135,537,439,301.34/408,058.60
  6. Step 6: Final answer
    x = 332,151.90

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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.