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Finding the Fourth Proportional to 402, 603.12 and 228.48

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Solution

The fourth proportional to 402, 603.12 and 228.48 is: 342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    402 : 603.12 = 228.48 : x
  2. Step 2: Convert to fraction form
    402/603.12 = 228.48/x
  3. Step 3: Cross multiply
    402x = 603.12 × 228.48
  4. Step 4: Simplify right side
    402x = 137,800.86
  5. Step 5: Solve for x
    x = 137,800.86/402
  6. Step 6: Final answer
    x = 342.79

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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.