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Finding the Fourth Proportional to 634.08, 874.98 and 354.28

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Solution

The fourth proportional to 634.08, 874.98 and 354.28 is: 488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.08 : 874.98 = 354.28 : x
  2. Step 2: Convert to fraction form
    634.08/874.98 = 354.28/x
  3. Step 3: Cross multiply
    634.08x = 874.98 × 354.28
  4. Step 4: Simplify right side
    634.08x = 309,987.91
  5. Step 5: Solve for x
    x = 309,987.91/634.08
  6. Step 6: Final answer
    x = 488.88

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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.