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Finding the Fourth Proportional to 347.71, 479.85 and 216.76

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Solution

The fourth proportional to 347.71, 479.85 and 216.76 is: 299.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.71 : 479.85 = 216.76 : x
  2. Step 2: Convert to fraction form
    347.71/479.85 = 216.76/x
  3. Step 3: Cross multiply
    347.71x = 479.85 × 216.76
  4. Step 4: Simplify right side
    347.71x = 104,009.89
  5. Step 5: Solve for x
    x = 104,009.89/347.71
  6. Step 6: Final answer
    x = 299.13

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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.