Home / 1,391.24-2,087.07-417.23

Finding the Fourth Proportional to 1,391.24, 2,087.07 and 417.23

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Solution

The fourth proportional to 1,391.24, 2,087.07 and 417.23 is: 625.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.24 : 2,087.07 = 417.23 : x
  2. Step 2: Convert to fraction form
    1,391.24/2,087.07 = 417.23/x
  3. Step 3: Cross multiply
    1,391.24x = 2,087.07 × 417.23
  4. Step 4: Simplify right side
    1,391.24x = 870,788.22
  5. Step 5: Solve for x
    x = 870,788.22/1,391.24
  6. Step 6: Final answer
    x = 625.91

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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.