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Finding the Fourth Proportional to 347.11, 478.75 and 227.40

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Solution

The fourth proportional to 347.11, 478.75 and 227.40 is: 313.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.11 : 478.75 = 227.40 : x
  2. Step 2: Convert to fraction form
    347.11/478.75 = 227.40/x
  3. Step 3: Cross multiply
    347.11x = 478.75 × 227.40
  4. Step 4: Simplify right side
    347.11x = 108,867.75
  5. Step 5: Solve for x
    x = 108,867.75/347.11
  6. Step 6: Final answer
    x = 313.64

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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.