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Finding the Fourth Proportional to 325,042.80, 487,564.20 and 218,754.60

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Solution

The fourth proportional to 325,042.80, 487,564.20 and 218,754.60 is: 328,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,042.80 : 487,564.20 = 218,754.60 : x
  2. Step 2: Convert to fraction form
    325,042.80/487,564.20 = 218,754.60/x
  3. Step 3: Cross multiply
    325,042.80x = 487,564.20 × 218,754.60
  4. Step 4: Simplify right side
    325,042.80x = 106,656,911,545.32
  5. Step 5: Solve for x
    x = 106,656,911,545.32/325,042.80
  6. Step 6: Final answer
    x = 328,131.90

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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.