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Finding the Fourth Proportional to 288,990.88, 398,791.92 and 159,923.68

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Solution

The fourth proportional to 288,990.88, 398,791.92 and 159,923.68 is: 220,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,990.88 : 398,791.92 = 159,923.68 : x
  2. Step 2: Convert to fraction form
    288,990.88/398,791.92 = 159,923.68/x
  3. Step 3: Cross multiply
    288,990.88x = 398,791.92 × 159,923.68
  4. Step 4: Simplify right side
    288,990.88x = 63,776,271,400.67
  5. Step 5: Solve for x
    x = 63,776,271,400.67/288,990.88
  6. Step 6: Final answer
    x = 220,686.10

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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.