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Finding the Fourth Proportional to 351.11, 521.90 and 341.76

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Solution

The fourth proportional to 351.11, 521.90 and 341.76 is: 507.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.11 : 521.90 = 341.76 : x
  2. Step 2: Convert to fraction form
    351.11/521.90 = 341.76/x
  3. Step 3: Cross multiply
    351.11x = 521.90 × 341.76
  4. Step 4: Simplify right side
    351.11x = 178,362.84
  5. Step 5: Solve for x
    x = 178,362.84/351.11
  6. Step 6: Final answer
    x = 507.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.