Home / 2,155.45-2,974.43-1,317.55

Finding the Fourth Proportional to 2,155.45, 2,974.43 and 1,317.55

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Solution

The fourth proportional to 2,155.45, 2,974.43 and 1,317.55 is: 1,818.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.45 : 2,974.43 = 1,317.55 : x
  2. Step 2: Convert to fraction form
    2,155.45/2,974.43 = 1,317.55/x
  3. Step 3: Cross multiply
    2,155.45x = 2,974.43 × 1,317.55
  4. Step 4: Simplify right side
    2,155.45x = 3,918,976.08
  5. Step 5: Solve for x
    x = 3,918,976.08/2,155.45
  6. Step 6: Final answer
    x = 1,818.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.