Home / 1,391.95-1,929.68-1,317.97

Finding the Fourth Proportional to 1,391.95, 1,929.68 and 1,317.97

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Solution

The fourth proportional to 1,391.95, 1,929.68 and 1,317.97 is: 1,827.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.95 : 1,929.68 = 1,317.97 : x
  2. Step 2: Convert to fraction form
    1,391.95/1,929.68 = 1,317.97/x
  3. Step 3: Cross multiply
    1,391.95x = 1,929.68 × 1,317.97
  4. Step 4: Simplify right side
    1,391.95x = 2,543,260.35
  5. Step 5: Solve for x
    x = 2,543,260.35/1,391.95
  6. Step 6: Final answer
    x = 1,827.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.