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Finding the Fourth Proportional to 345.12, 476.05 and 251.97

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Solution

The fourth proportional to 345.12, 476.05 and 251.97 is: 347.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.12 : 476.05 = 251.97 : x
  2. Step 2: Convert to fraction form
    345.12/476.05 = 251.97/x
  3. Step 3: Cross multiply
    345.12x = 476.05 × 251.97
  4. Step 4: Simplify right side
    345.12x = 119,950.32
  5. Step 5: Solve for x
    x = 119,950.32/345.12
  6. Step 6: Final answer
    x = 347.56

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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.