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Finding the Fourth Proportional to 353.21, 530.04 and 136.79

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Solution

The fourth proportional to 353.21, 530.04 and 136.79 is: 205.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.21 : 530.04 = 136.79 : x
  2. Step 2: Convert to fraction form
    353.21/530.04 = 136.79/x
  3. Step 3: Cross multiply
    353.21x = 530.04 × 136.79
  4. Step 4: Simplify right side
    353.21x = 72,501.52
  5. Step 5: Solve for x
    x = 72,501.52/353.21
  6. Step 6: Final answer
    x = 205.27

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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.