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Finding the Fourth Proportional to 1,758.36, 2,425.11 and 1,128.89

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Solution

The fourth proportional to 1,758.36, 2,425.11 and 1,128.89 is: 1,556.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.36 : 2,425.11 = 1,128.89 : x
  2. Step 2: Convert to fraction form
    1,758.36/2,425.11 = 1,128.89/x
  3. Step 3: Cross multiply
    1,758.36x = 2,425.11 × 1,128.89
  4. Step 4: Simplify right side
    1,758.36x = 2,737,684.26
  5. Step 5: Solve for x
    x = 2,737,684.26/1,758.36
  6. Step 6: Final answer
    x = 1,556.95

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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.