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Finding the Fourth Proportional to 1,124.26, 1,551.63 and 658.51

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Solution

The fourth proportional to 1,124.26, 1,551.63 and 658.51 is: 908.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.26 : 1,551.63 = 658.51 : x
  2. Step 2: Convert to fraction form
    1,124.26/1,551.63 = 658.51/x
  3. Step 3: Cross multiply
    1,124.26x = 1,551.63 × 658.51
  4. Step 4: Simplify right side
    1,124.26x = 1,021,763.87
  5. Step 5: Solve for x
    x = 1,021,763.87/1,124.26
  6. Step 6: Final answer
    x = 908.83

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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.