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Finding the Fourth Proportional to 281,876.64, 388,986.80 and 154,551.92

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Solution

The fourth proportional to 281,876.64, 388,986.80 and 154,551.92 is: 213,280.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,876.64 : 388,986.80 = 154,551.92 : x
  2. Step 2: Convert to fraction form
    281,876.64/388,986.80 = 154,551.92/x
  3. Step 3: Cross multiply
    281,876.64x = 388,986.80 × 154,551.92
  4. Step 4: Simplify right side
    281,876.64x = 60,118,656,794.66
  5. Step 5: Solve for x
    x = 60,118,656,794.66/281,876.64
  6. Step 6: Final answer
    x = 213,280.02

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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.