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Finding the Fourth Proportional to 1,015.53, 1,399.01 and 966.12

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Solution

The fourth proportional to 1,015.53, 1,399.01 and 966.12 is: 1,330.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.53 : 1,399.01 = 966.12 : x
  2. Step 2: Convert to fraction form
    1,015.53/1,399.01 = 966.12/x
  3. Step 3: Cross multiply
    1,015.53x = 1,399.01 × 966.12
  4. Step 4: Simplify right side
    1,015.53x = 1,351,606.71
  5. Step 5: Solve for x
    x = 1,351,606.71/1,015.53
  6. Step 6: Final answer
    x = 1,330.94

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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.