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Finding the Fourth Proportional to 768.43, 1,153.05 and 335.89

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Solution

The fourth proportional to 768.43, 1,153.05 and 335.89 is: 504.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.43 : 1,153.05 = 335.89 : x
  2. Step 2: Convert to fraction form
    768.43/1,153.05 = 335.89/x
  3. Step 3: Cross multiply
    768.43x = 1,153.05 × 335.89
  4. Step 4: Simplify right side
    768.43x = 387,297.96
  5. Step 5: Solve for x
    x = 387,297.96/768.43
  6. Step 6: Final answer
    x = 504.01

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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.