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Finding the Fourth Proportional to 281,891.52, 389,018.16 and 154,575.72

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Solution

The fourth proportional to 281,891.52, 389,018.16 and 154,575.72 is: 213,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,891.52 : 389,018.16 = 154,575.72 : x
  2. Step 2: Convert to fraction form
    281,891.52/389,018.16 = 154,575.72/x
  3. Step 3: Cross multiply
    281,891.52x = 389,018.16 × 154,575.72
  4. Step 4: Simplify right side
    281,891.52x = 60,132,762,175.08
  5. Step 5: Solve for x
    x = 60,132,762,175.08/281,891.52
  6. Step 6: Final answer
    x = 213,318.80

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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.