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Finding the Fourth Proportional to 403.12, 603.96 and 248.68

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Solution

The fourth proportional to 403.12, 603.96 and 248.68 is: 372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.12 : 603.96 = 248.68 : x
  2. Step 2: Convert to fraction form
    403.12/603.96 = 248.68/x
  3. Step 3: Cross multiply
    403.12x = 603.96 × 248.68
  4. Step 4: Simplify right side
    403.12x = 150,192.77
  5. Step 5: Solve for x
    x = 150,192.77/403.12
  6. Step 6: Final answer
    x = 372.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.