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Finding the Fourth Proportional to 281,398.62, 388,326.66 and 154,071.48

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Solution

The fourth proportional to 281,398.62, 388,326.66 and 154,071.48 is: 212,616.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,398.62 : 388,326.66 = 154,071.48 : x
  2. Step 2: Convert to fraction form
    281,398.62/388,326.66 = 154,071.48/x
  3. Step 3: Cross multiply
    281,398.62x = 388,326.66 × 154,071.48
  4. Step 4: Simplify right side
    281,398.62x = 59,830,063,229.66
  5. Step 5: Solve for x
    x = 59,830,063,229.66/281,398.62
  6. Step 6: Final answer
    x = 212,616.76

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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.