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Finding the Fourth Proportional to 281,418.32, 388,368.84 and 154,105.04

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Solution

The fourth proportional to 281,418.32, 388,368.84 and 154,105.04 is: 212,671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,418.32 : 388,368.84 = 154,105.04 : x
  2. Step 2: Convert to fraction form
    281,418.32/388,368.84 = 154,105.04/x
  3. Step 3: Cross multiply
    281,418.32x = 388,368.84 × 154,105.04
  4. Step 4: Simplify right side
    281,418.32x = 59,849,595,622.95
  5. Step 5: Solve for x
    x = 59,849,595,622.95/281,418.32
  6. Step 6: Final answer
    x = 212,671.28

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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.