Home / 1,955.18-2,930.98-721.73

Finding the Fourth Proportional to 1,955.18, 2,930.98 and 721.73

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Solution

The fourth proportional to 1,955.18, 2,930.98 and 721.73 is: 1,081.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.18 : 2,930.98 = 721.73 : x
  2. Step 2: Convert to fraction form
    1,955.18/2,930.98 = 721.73/x
  3. Step 3: Cross multiply
    1,955.18x = 2,930.98 × 721.73
  4. Step 4: Simplify right side
    1,955.18x = 2,115,376.20
  5. Step 5: Solve for x
    x = 2,115,376.20/1,955.18
  6. Step 6: Final answer
    x = 1,081.93

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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.