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Finding the Fourth Proportional to 281,809.29, 388,893.84 and 154,484.19

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Solution

The fourth proportional to 281,809.29, 388,893.84 and 154,484.19 is: 213,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,809.29 : 388,893.84 = 154,484.19 : x
  2. Step 2: Convert to fraction form
    281,809.29/388,893.84 = 154,484.19/x
  3. Step 3: Cross multiply
    281,809.29x = 388,893.84 × 154,484.19
  4. Step 4: Simplify right side
    281,809.29x = 60,077,949,868.39
  5. Step 5: Solve for x
    x = 60,077,949,868.39/281,809.29
  6. Step 6: Final answer
    x = 213,186.55

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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.