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Finding the Fourth Proportional to 611.98, 844.50 and 346.42

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Solution

The fourth proportional to 611.98, 844.50 and 346.42 is: 478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.98 : 844.50 = 346.42 : x
  2. Step 2: Convert to fraction form
    611.98/844.50 = 346.42/x
  3. Step 3: Cross multiply
    611.98x = 844.50 × 346.42
  4. Step 4: Simplify right side
    611.98x = 292,551.69
  5. Step 5: Solve for x
    x = 292,551.69/611.98
  6. Step 6: Final answer
    x = 478.04

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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.