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Finding the Fourth Proportional to 956.32, 1,318.40 and 935.62

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Solution

The fourth proportional to 956.32, 1,318.40 and 935.62 is: 1,289.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.32 : 1,318.40 = 935.62 : x
  2. Step 2: Convert to fraction form
    956.32/1,318.40 = 935.62/x
  3. Step 3: Cross multiply
    956.32x = 1,318.40 × 935.62
  4. Step 4: Simplify right side
    956.32x = 1,233,521.41
  5. Step 5: Solve for x
    x = 1,233,521.41/956.32
  6. Step 6: Final answer
    x = 1,289.86

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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.