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Finding the Fourth Proportional to 779.28, 1,169.73 and 346.74

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Solution

The fourth proportional to 779.28, 1,169.73 and 346.74 is: 520.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.28 : 1,169.73 = 346.74 : x
  2. Step 2: Convert to fraction form
    779.28/1,169.73 = 346.74/x
  3. Step 3: Cross multiply
    779.28x = 1,169.73 × 346.74
  4. Step 4: Simplify right side
    779.28x = 405,592.18
  5. Step 5: Solve for x
    x = 405,592.18/779.28
  6. Step 6: Final answer
    x = 520.47

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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.