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Finding the Fourth Proportional to 634.12, 875.28 and 401.40

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Solution

The fourth proportional to 634.12, 875.28 and 401.40 is: 554.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.12 : 875.28 = 401.40 : x
  2. Step 2: Convert to fraction form
    634.12/875.28 = 401.40/x
  3. Step 3: Cross multiply
    634.12x = 875.28 × 401.40
  4. Step 4: Simplify right side
    634.12x = 351,337.39
  5. Step 5: Solve for x
    x = 351,337.39/634.12
  6. Step 6: Final answer
    x = 554.06

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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.