Home / 1,391.23-2,087.25-417.34

Finding the Fourth Proportional to 1,391.23, 2,087.25 and 417.34

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Solution

The fourth proportional to 1,391.23, 2,087.25 and 417.34 is: 626.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.23 : 2,087.25 = 417.34 : x
  2. Step 2: Convert to fraction form
    1,391.23/2,087.25 = 417.34/x
  3. Step 3: Cross multiply
    1,391.23x = 2,087.25 × 417.34
  4. Step 4: Simplify right side
    1,391.23x = 871,092.92
  5. Step 5: Solve for x
    x = 871,092.92/1,391.23
  6. Step 6: Final answer
    x = 626.13

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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.