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Finding the Fourth Proportional to 633.45, 874.15 and 353.70

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Solution

The fourth proportional to 633.45, 874.15 and 353.70 is: 488.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.45 : 874.15 = 353.70 : x
  2. Step 2: Convert to fraction form
    633.45/874.15 = 353.70/x
  3. Step 3: Cross multiply
    633.45x = 874.15 × 353.70
  4. Step 4: Simplify right side
    633.45x = 309,185.09
  5. Step 5: Solve for x
    x = 309,185.09/633.45
  6. Step 6: Final answer
    x = 488.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.