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Finding the Fourth Proportional to 634.41, 875.66 and 385.65

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Solution

The fourth proportional to 634.41, 875.66 and 385.65 is: 532.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.41 : 875.66 = 385.65 : x
  2. Step 2: Convert to fraction form
    634.41/875.66 = 385.65/x
  3. Step 3: Cross multiply
    634.41x = 875.66 × 385.65
  4. Step 4: Simplify right side
    634.41x = 337,696.35
  5. Step 5: Solve for x
    x = 337,696.35/634.41
  6. Step 6: Final answer
    x = 532.30

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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.