Home / 1,317.23-1,815.12-1,224.97

Finding the Fourth Proportional to 1,317.23, 1,815.12 and 1,224.97

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Solution

The fourth proportional to 1,317.23, 1,815.12 and 1,224.97 is: 1,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.23 : 1,815.12 = 1,224.97 : x
  2. Step 2: Convert to fraction form
    1,317.23/1,815.12 = 1,224.97/x
  3. Step 3: Cross multiply
    1,317.23x = 1,815.12 × 1,224.97
  4. Step 4: Simplify right side
    1,317.23x = 2,223,467.55
  5. Step 5: Solve for x
    x = 2,223,467.55/1,317.23
  6. Step 6: Final answer
    x = 1,687.99

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1.5x scale

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.