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Finding the Fourth Proportional to 351.30, 527.36 and 279.21

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Solution

The fourth proportional to 351.30, 527.36 and 279.21 is: 419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.30 : 527.36 = 279.21 : x
  2. Step 2: Convert to fraction form
    351.30/527.36 = 279.21/x
  3. Step 3: Cross multiply
    351.30x = 527.36 × 279.21
  4. Step 4: Simplify right side
    351.30x = 147,242.79
  5. Step 5: Solve for x
    x = 147,242.79/351.30
  6. Step 6: Final answer
    x = 419.14

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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.