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Finding the Fourth Proportional to 768.85, 1,152.63 and 335.68

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Solution

The fourth proportional to 768.85, 1,152.63 and 335.68 is: 503.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.85 : 1,152.63 = 335.68 : x
  2. Step 2: Convert to fraction form
    768.85/1,152.63 = 335.68/x
  3. Step 3: Cross multiply
    768.85x = 1,152.63 × 335.68
  4. Step 4: Simplify right side
    768.85x = 386,914.84
  5. Step 5: Solve for x
    x = 386,914.84/768.85
  6. Step 6: Final answer
    x = 503.24

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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.