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Finding the Fourth Proportional to 281,402.84, 388,345.68 and 154,079.30

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Solution

The fourth proportional to 281,402.84, 388,345.68 and 154,079.30 is: 212,634.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,402.84 : 388,345.68 = 154,079.30 : x
  2. Step 2: Convert to fraction form
    281,402.84/388,345.68 = 154,079.30/x
  3. Step 3: Cross multiply
    281,402.84x = 388,345.68 × 154,079.30
  4. Step 4: Simplify right side
    281,402.84x = 59,836,030,532.42
  5. Step 5: Solve for x
    x = 59,836,030,532.42/281,402.84
  6. Step 6: Final answer
    x = 212,634.78

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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.