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Finding the Fourth Proportional to 768.35, 1,151.88 and 335.18

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Solution

The fourth proportional to 768.35, 1,151.88 and 335.18 is: 502.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.35 : 1,151.88 = 335.18 : x
  2. Step 2: Convert to fraction form
    768.35/1,151.88 = 335.18/x
  3. Step 3: Cross multiply
    768.35x = 1,151.88 × 335.18
  4. Step 4: Simplify right side
    768.35x = 386,087.14
  5. Step 5: Solve for x
    x = 386,087.14/768.35
  6. Step 6: Final answer
    x = 502.49

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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.