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Finding the Fourth Proportional to 942.26, 1,299.51 and 767.30

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Solution

The fourth proportional to 942.26, 1,299.51 and 767.30 is: 1,058.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.26 : 1,299.51 = 767.30 : x
  2. Step 2: Convert to fraction form
    942.26/1,299.51 = 767.30/x
  3. Step 3: Cross multiply
    942.26x = 1,299.51 × 767.30
  4. Step 4: Simplify right side
    942.26x = 997,107.53
  5. Step 5: Solve for x
    x = 997,107.53/942.26
  6. Step 6: Final answer
    x = 1,058.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.