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Finding the Fourth Proportional to 634.80, 875.08 and 401.52

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Solution

The fourth proportional to 634.80, 875.08 and 401.52 is: 553.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.80 : 875.08 = 401.52 : x
  2. Step 2: Convert to fraction form
    634.80/875.08 = 401.52/x
  3. Step 3: Cross multiply
    634.80x = 875.08 × 401.52
  4. Step 4: Simplify right side
    634.80x = 351,362.12
  5. Step 5: Solve for x
    x = 351,362.12/634.80
  6. Step 6: Final answer
    x = 553.50

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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.