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Finding the Fourth Proportional to 786.35, 1,179.53 and 375.39

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Solution

The fourth proportional to 786.35, 1,179.53 and 375.39 is: 563.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.35 : 1,179.53 = 375.39 : x
  2. Step 2: Convert to fraction form
    786.35/1,179.53 = 375.39/x
  3. Step 3: Cross multiply
    786.35x = 1,179.53 × 375.39
  4. Step 4: Simplify right side
    786.35x = 442,781.89
  5. Step 5: Solve for x
    x = 442,781.89/786.35
  6. Step 6: Final answer
    x = 563.09

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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.