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Finding the Fourth Proportional to 268,278.80, 402,272.40 and 90,694.40

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Solution

The fourth proportional to 268,278.80, 402,272.40 and 90,694.40 is: 135,992.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,278.80 : 402,272.40 = 90,694.40 : x
  2. Step 2: Convert to fraction form
    268,278.80/402,272.40 = 90,694.40/x
  3. Step 3: Cross multiply
    268,278.80x = 402,272.40 × 90,694.40
  4. Step 4: Simplify right side
    268,278.80x = 36,483,853,954.56
  5. Step 5: Solve for x
    x = 36,483,853,954.56/268,278.80
  6. Step 6: Final answer
    x = 135,992.31

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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.