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Finding the Fourth Proportional to 268,286.28, 402,179.28 and 90,669.12

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Solution

The fourth proportional to 268,286.28, 402,179.28 and 90,669.12 is: 135,919.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,286.28 : 402,179.28 = 90,669.12 : x
  2. Step 2: Convert to fraction form
    268,286.28/402,179.28 = 90,669.12/x
  3. Step 3: Cross multiply
    268,286.28x = 402,179.28 × 90,669.12
  4. Step 4: Simplify right side
    268,286.28x = 36,465,241,399.83
  5. Step 5: Solve for x
    x = 36,465,241,399.83/268,286.28
  6. Step 6: Final answer
    x = 135,919.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.