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Finding the Fourth Proportional to 431.52, 648 and 336.12

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Solution

The fourth proportional to 431.52, 648 and 336.12 is: 504.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.52 : 648 = 336.12 : x
  2. Step 2: Convert to fraction form
    431.52/648 = 336.12/x
  3. Step 3: Cross multiply
    431.52x = 648 × 336.12
  4. Step 4: Simplify right side
    431.52x = 217,805.76
  5. Step 5: Solve for x
    x = 217,805.76/431.52
  6. Step 6: Final answer
    x = 504.74

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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.