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Finding the Fourth Proportional to 611.80, 844.07 and 346.21

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Solution

The fourth proportional to 611.80, 844.07 and 346.21 is: 477.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.80 : 844.07 = 346.21 : x
  2. Step 2: Convert to fraction form
    611.80/844.07 = 346.21/x
  3. Step 3: Cross multiply
    611.80x = 844.07 × 346.21
  4. Step 4: Simplify right side
    611.80x = 292,223.58
  5. Step 5: Solve for x
    x = 292,223.58/611.80
  6. Step 6: Final answer
    x = 477.65

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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.