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Finding the Fourth Proportional to 919, 1,377.06 and 658.36

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Solution

The fourth proportional to 919, 1,377.06 and 658.36 is: 986.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    919 : 1,377.06 = 658.36 : x
  2. Step 2: Convert to fraction form
    919/1,377.06 = 658.36/x
  3. Step 3: Cross multiply
    919x = 1,377.06 × 658.36
  4. Step 4: Simplify right side
    919x = 906,601.22
  5. Step 5: Solve for x
    x = 906,601.22/919
  6. Step 6: Final answer
    x = 986.51

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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.