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Finding the Fourth Proportional to 288,120.80, 431,630.40 and 154,956.80

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Solution

The fourth proportional to 288,120.80, 431,630.40 and 154,956.80 is: 232,138.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,120.80 : 431,630.40 = 154,956.80 : x
  2. Step 2: Convert to fraction form
    288,120.80/431,630.40 = 154,956.80/x
  3. Step 3: Cross multiply
    288,120.80x = 431,630.40 × 154,956.80
  4. Step 4: Simplify right side
    288,120.80x = 66,884,065,566.72
  5. Step 5: Solve for x
    x = 66,884,065,566.72/288,120.80
  6. Step 6: Final answer
    x = 232,138.97

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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.