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Finding the Fourth Proportional to 634, 874.84 and 354.18

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Solution

The fourth proportional to 634, 874.84 and 354.18 is: 488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    634 : 874.84 = 354.18 : x
  2. Step 2: Convert to fraction form
    634/874.84 = 354.18/x
  3. Step 3: Cross multiply
    634x = 874.84 × 354.18
  4. Step 4: Simplify right side
    634x = 309,850.83
  5. Step 5: Solve for x
    x = 309,850.83/634
  6. Step 6: Final answer
    x = 488.72

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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.