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Finding the Fourth Proportional to 1,124.30, 1,550.91 and 658.46

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Solution

The fourth proportional to 1,124.30, 1,550.91 and 658.46 is: 908.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.30 : 1,550.91 = 658.46 : x
  2. Step 2: Convert to fraction form
    1,124.30/1,550.91 = 658.46/x
  3. Step 3: Cross multiply
    1,124.30x = 1,550.91 × 658.46
  4. Step 4: Simplify right side
    1,124.30x = 1,021,212.20
  5. Step 5: Solve for x
    x = 1,021,212.20/1,124.30
  6. Step 6: Final answer
    x = 908.31

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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.