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Finding the Fourth Proportional to 318,402.80, 439,386.66 and 173,204

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Solution

The fourth proportional to 318,402.80, 439,386.66 and 173,204 is: 239,016.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,402.80 : 439,386.66 = 173,204 : x
  2. Step 2: Convert to fraction form
    318,402.80/439,386.66 = 173,204/x
  3. Step 3: Cross multiply
    318,402.80x = 439,386.66 × 173,204
  4. Step 4: Simplify right side
    318,402.80x = 76,103,527,058.64
  5. Step 5: Solve for x
    x = 76,103,527,058.64/318,402.80
  6. Step 6: Final answer
    x = 239,016.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.