Home / 1,391.46-2,087.17-558.89

Finding the Fourth Proportional to 1,391.46, 2,087.17 and 558.89

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Solution

The fourth proportional to 1,391.46, 2,087.17 and 558.89 is: 838.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.46 : 2,087.17 = 558.89 : x
  2. Step 2: Convert to fraction form
    1,391.46/2,087.17 = 558.89/x
  3. Step 3: Cross multiply
    1,391.46x = 2,087.17 × 558.89
  4. Step 4: Simplify right side
    1,391.46x = 1,166,498.44
  5. Step 5: Solve for x
    x = 1,166,498.44/1,391.46
  6. Step 6: Final answer
    x = 838.33

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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.