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Finding the Fourth Proportional to 281,219.04, 388,082.28 and 153,894.64

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Solution

The fourth proportional to 281,219.04, 388,082.28 and 153,894.64 is: 212,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,219.04 : 388,082.28 = 153,894.64 : x
  2. Step 2: Convert to fraction form
    281,219.04/388,082.28 = 153,894.64/x
  3. Step 3: Cross multiply
    281,219.04x = 388,082.28 × 153,894.64
  4. Step 4: Simplify right side
    281,219.04x = 59,723,782,770.98
  5. Step 5: Solve for x
    x = 59,723,782,770.98/281,219.04
  6. Step 6: Final answer
    x = 212,374.61

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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.