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Finding the Fourth Proportional to 281,467.89, 388,425.87 and 154,143.57

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Solution

The fourth proportional to 281,467.89, 388,425.87 and 154,143.57 is: 212,718.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,467.89 : 388,425.87 = 154,143.57 : x
  2. Step 2: Convert to fraction form
    281,467.89/388,425.87 = 154,143.57/x
  3. Step 3: Cross multiply
    281,467.89x = 388,425.87 × 154,143.57
  4. Step 4: Simplify right side
    281,467.89x = 59,873,350,282.16
  5. Step 5: Solve for x
    x = 59,873,350,282.16/281,467.89
  6. Step 6: Final answer
    x = 212,718.23

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1.5x scale

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.