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Finding the Fourth Proportional to 956.06, 1,311.46 and 947.42

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Solution

The fourth proportional to 956.06, 1,311.46 and 947.42 is: 1,299.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.06 : 1,311.46 = 947.42 : x
  2. Step 2: Convert to fraction form
    956.06/1,311.46 = 947.42/x
  3. Step 3: Cross multiply
    956.06x = 1,311.46 × 947.42
  4. Step 4: Simplify right side
    956.06x = 1,242,503.43
  5. Step 5: Solve for x
    x = 1,242,503.43/956.06
  6. Step 6: Final answer
    x = 1,299.61

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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.