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Finding the Fourth Proportional to 345.18, 476.31 and 234.80

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Solution

The fourth proportional to 345.18, 476.31 and 234.80 is: 323.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.18 : 476.31 = 234.80 : x
  2. Step 2: Convert to fraction form
    345.18/476.31 = 234.80/x
  3. Step 3: Cross multiply
    345.18x = 476.31 × 234.80
  4. Step 4: Simplify right side
    345.18x = 111,835.21
  5. Step 5: Solve for x
    x = 111,835.21/345.18
  6. Step 6: Final answer
    x = 323.99

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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.