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Finding the Fourth Proportional to 347.11, 521.19 and 210.76

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Solution

The fourth proportional to 347.11, 521.19 and 210.76 is: 316.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.11 : 521.19 = 210.76 : x
  2. Step 2: Convert to fraction form
    347.11/521.19 = 210.76/x
  3. Step 3: Cross multiply
    347.11x = 521.19 × 210.76
  4. Step 4: Simplify right side
    347.11x = 109,846.00
  5. Step 5: Solve for x
    x = 109,846.00/347.11
  6. Step 6: Final answer
    x = 316.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.