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Finding the Fourth Proportional to 353.85, 530.81 and 207.82

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Solution

The fourth proportional to 353.85, 530.81 and 207.82 is: 311.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.85 : 530.81 = 207.82 : x
  2. Step 2: Convert to fraction form
    353.85/530.81 = 207.82/x
  3. Step 3: Cross multiply
    353.85x = 530.81 × 207.82
  4. Step 4: Simplify right side
    353.85x = 110,312.93
  5. Step 5: Solve for x
    x = 110,312.93/353.85
  6. Step 6: Final answer
    x = 311.75

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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.