Home / 1,276.29-1,914.62-398.85

Finding the Fourth Proportional to 1,276.29, 1,914.62 and 398.85

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Solution

The fourth proportional to 1,276.29, 1,914.62 and 398.85 is: 598.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.29 : 1,914.62 = 398.85 : x
  2. Step 2: Convert to fraction form
    1,276.29/1,914.62 = 398.85/x
  3. Step 3: Cross multiply
    1,276.29x = 1,914.62 × 398.85
  4. Step 4: Simplify right side
    1,276.29x = 763,644.19
  5. Step 5: Solve for x
    x = 763,644.19/1,276.29
  6. Step 6: Final answer
    x = 598.33

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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.