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Finding the Fourth Proportional to 634.26, 874.71 and 401.70

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Solution

The fourth proportional to 634.26, 874.71 and 401.70 is: 553.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.26 : 874.71 = 401.70 : x
  2. Step 2: Convert to fraction form
    634.26/874.71 = 401.70/x
  3. Step 3: Cross multiply
    634.26x = 874.71 × 401.70
  4. Step 4: Simplify right side
    634.26x = 351,371.01
  5. Step 5: Solve for x
    x = 351,371.01/634.26
  6. Step 6: Final answer
    x = 553.99

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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.