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Finding the Fourth Proportional to 352,920.80, 487,029.47 and 199,988.11

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Solution

The fourth proportional to 352,920.80, 487,029.47 and 199,988.11 is: 275,982.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,920.80 : 487,029.47 = 199,988.11 : x
  2. Step 2: Convert to fraction form
    352,920.80/487,029.47 = 199,988.11/x
  3. Step 3: Cross multiply
    352,920.80x = 487,029.47 × 199,988.11
  4. Step 4: Simplify right side
    352,920.80x = 97,400,101,256.85
  5. Step 5: Solve for x
    x = 97,400,101,256.85/352,920.80
  6. Step 6: Final answer
    x = 275,982.88

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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.