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Finding the Fourth Proportional to 281,763.28, 388,842.96 and 154,438.84

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Solution

The fourth proportional to 281,763.28, 388,842.96 and 154,438.84 is: 213,130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,763.28 : 388,842.96 = 154,438.84 : x
  2. Step 2: Convert to fraction form
    281,763.28/388,842.96 = 154,438.84/x
  3. Step 3: Cross multiply
    281,763.28x = 388,842.96 × 154,438.84
  4. Step 4: Simplify right side
    281,763.28x = 60,052,455,684.57
  5. Step 5: Solve for x
    x = 60,052,455,684.57/281,763.28
  6. Step 6: Final answer
    x = 213,130.88

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1.5x scale

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.