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Finding the Fourth Proportional to 347.16, 479.10 and 189.81

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Solution

The fourth proportional to 347.16, 479.10 and 189.81 is: 261.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.16 : 479.10 = 189.81 : x
  2. Step 2: Convert to fraction form
    347.16/479.10 = 189.81/x
  3. Step 3: Cross multiply
    347.16x = 479.10 × 189.81
  4. Step 4: Simplify right side
    347.16x = 90,937.97
  5. Step 5: Solve for x
    x = 90,937.97/347.16
  6. Step 6: Final answer
    x = 261.95

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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.