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Finding the Fourth Proportional to 611.96, 844.49 and 346.40

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Solution

The fourth proportional to 611.96, 844.49 and 346.40 is: 478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.96 : 844.49 = 346.40 : x
  2. Step 2: Convert to fraction form
    611.96/844.49 = 346.40/x
  3. Step 3: Cross multiply
    611.96x = 844.49 × 346.40
  4. Step 4: Simplify right side
    611.96x = 292,534.31
  5. Step 5: Solve for x
    x = 292,534.31/611.96
  6. Step 6: Final answer
    x = 478.03

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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.