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Finding the Fourth Proportional to 268,288.80, 402,287.40 and 90,704.40

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Solution

The fourth proportional to 268,288.80, 402,287.40 and 90,704.40 is: 136,007.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,288.80 : 402,287.40 = 90,704.40 : x
  2. Step 2: Convert to fraction form
    268,288.80/402,287.40 = 90,704.40/x
  3. Step 3: Cross multiply
    268,288.80x = 402,287.40 × 90,704.40
  4. Step 4: Simplify right side
    268,288.80x = 36,489,237,244.56
  5. Step 5: Solve for x
    x = 36,489,237,244.56/268,288.80
  6. Step 6: Final answer
    x = 136,007.31

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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.