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Finding the Fourth Proportional to 347.46, 479.51 and 216.51

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Solution

The fourth proportional to 347.46, 479.51 and 216.51 is: 298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.46 : 479.51 = 216.51 : x
  2. Step 2: Convert to fraction form
    347.46/479.51 = 216.51/x
  3. Step 3: Cross multiply
    347.46x = 479.51 × 216.51
  4. Step 4: Simplify right side
    347.46x = 103,815.23
  5. Step 5: Solve for x
    x = 103,815.23/347.46
  6. Step 6: Final answer
    x = 298.79

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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.