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Finding the Fourth Proportional to 645.98, 969.57 and 353.62

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Solution

The fourth proportional to 645.98, 969.57 and 353.62 is: 530.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.98 : 969.57 = 353.62 : x
  2. Step 2: Convert to fraction form
    645.98/969.57 = 353.62/x
  3. Step 3: Cross multiply
    645.98x = 969.57 × 353.62
  4. Step 4: Simplify right side
    645.98x = 342,855.10
  5. Step 5: Solve for x
    x = 342,855.10/645.98
  6. Step 6: Final answer
    x = 530.76

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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.