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Finding the Fourth Proportional to 281,555.64, 388,546.65 and 154,231.20

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Solution

The fourth proportional to 281,555.64, 388,546.65 and 154,231.20 is: 212,838.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,555.64 : 388,546.65 = 154,231.20 : x
  2. Step 2: Convert to fraction form
    281,555.64/388,546.65 = 154,231.20/x
  3. Step 3: Cross multiply
    281,555.64x = 388,546.65 × 154,231.20
  4. Step 4: Simplify right side
    281,555.64x = 59,926,016,085.48
  5. Step 5: Solve for x
    x = 59,926,016,085.48/281,555.64
  6. Step 6: Final answer
    x = 212,838.98

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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.