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Finding the Fourth Proportional to 837.12, 1,254.96 and 490.80

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Solution

The fourth proportional to 837.12, 1,254.96 and 490.80 is: 735.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.12 : 1,254.96 = 490.80 : x
  2. Step 2: Convert to fraction form
    837.12/1,254.96 = 490.80/x
  3. Step 3: Cross multiply
    837.12x = 1,254.96 × 490.80
  4. Step 4: Simplify right side
    837.12x = 615,934.37
  5. Step 5: Solve for x
    x = 615,934.37/837.12
  6. Step 6: Final answer
    x = 735.78

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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.