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Finding the Fourth Proportional to 769.83, 1,154.25 and 379.52

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Solution

The fourth proportional to 769.83, 1,154.25 and 379.52 is: 569.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.83 : 1,154.25 = 379.52 : x
  2. Step 2: Convert to fraction form
    769.83/1,154.25 = 379.52/x
  3. Step 3: Cross multiply
    769.83x = 1,154.25 × 379.52
  4. Step 4: Simplify right side
    769.83x = 438,055.19
  5. Step 5: Solve for x
    x = 438,055.19/769.83
  6. Step 6: Final answer
    x = 569.03

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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.