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Finding the Fourth Proportional to 373,258.80, 515,104.88 and 209,918.43

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Solution

The fourth proportional to 373,258.80, 515,104.88 and 209,918.43 is: 289,691.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,258.80 : 515,104.88 = 209,918.43 : x
  2. Step 2: Convert to fraction form
    373,258.80/515,104.88 = 209,918.43/x
  3. Step 3: Cross multiply
    373,258.80x = 515,104.88 × 209,918.43
  4. Step 4: Simplify right side
    373,258.80x = 108,130,006,645.35
  5. Step 5: Solve for x
    x = 108,130,006,645.35/373,258.80
  6. Step 6: Final answer
    x = 289,691.78

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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.