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Finding the Fourth Proportional to 281,528.84, 388,509.90 and 154,206.56

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Solution

The fourth proportional to 281,528.84, 388,509.90 and 154,206.56 is: 212,805.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,528.84 : 388,509.90 = 154,206.56 : x
  2. Step 2: Convert to fraction form
    281,528.84/388,509.90 = 154,206.56/x
  3. Step 3: Cross multiply
    281,528.84x = 388,509.90 × 154,206.56
  4. Step 4: Simplify right side
    281,528.84x = 59,910,775,204.94
  5. Step 5: Solve for x
    x = 59,910,775,204.94/281,528.84
  6. Step 6: Final answer
    x = 212,805.11

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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.