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Finding the Fourth Proportional to 353.80, 530.52 and 207.83

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Solution

The fourth proportional to 353.80, 530.52 and 207.83 is: 311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.80 : 530.52 = 207.83 : x
  2. Step 2: Convert to fraction form
    353.80/530.52 = 207.83/x
  3. Step 3: Cross multiply
    353.80x = 530.52 × 207.83
  4. Step 4: Simplify right side
    353.80x = 110,257.97
  5. Step 5: Solve for x
    x = 110,257.97/353.80
  6. Step 6: Final answer
    x = 311.64

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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.