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Finding the Fourth Proportional to 634, 875.12 and 372

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Solution

The fourth proportional to 634, 875.12 and 372 is: 513.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    634 : 875.12 = 372 : x
  2. Step 2: Convert to fraction form
    634/875.12 = 372/x
  3. Step 3: Cross multiply
    634x = 875.12 × 372
  4. Step 4: Simplify right side
    634x = 325,544.64
  5. Step 5: Solve for x
    x = 325,544.64/634
  6. Step 6: Final answer
    x = 513.48

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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.