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Finding the Fourth Proportional to 345.15, 476.09 and 227.13

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Solution

The fourth proportional to 345.15, 476.09 and 227.13 is: 313.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.15 : 476.09 = 227.13 : x
  2. Step 2: Convert to fraction form
    345.15/476.09 = 227.13/x
  3. Step 3: Cross multiply
    345.15x = 476.09 × 227.13
  4. Step 4: Simplify right side
    345.15x = 108,134.89
  5. Step 5: Solve for x
    x = 108,134.89/345.15
  6. Step 6: Final answer
    x = 313.30

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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.