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Finding the Fourth Proportional to 960.76, 1,319.66 and 942.31

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Solution

The fourth proportional to 960.76, 1,319.66 and 942.31 is: 1,294.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.76 : 1,319.66 = 942.31 : x
  2. Step 2: Convert to fraction form
    960.76/1,319.66 = 942.31/x
  3. Step 3: Cross multiply
    960.76x = 1,319.66 × 942.31
  4. Step 4: Simplify right side
    960.76x = 1,243,528.81
  5. Step 5: Solve for x
    x = 1,243,528.81/960.76
  6. Step 6: Final answer
    x = 1,294.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.