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Finding the Fourth Proportional to 3,147.48, 4,722.03 and 956.43

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Solution

The fourth proportional to 3,147.48, 4,722.03 and 956.43 is: 1,434.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.48 : 4,722.03 = 956.43 : x
  2. Step 2: Convert to fraction form
    3,147.48/4,722.03 = 956.43/x
  3. Step 3: Cross multiply
    3,147.48x = 4,722.03 × 956.43
  4. Step 4: Simplify right side
    3,147.48x = 4,516,291.15
  5. Step 5: Solve for x
    x = 4,516,291.15/3,147.48
  6. Step 6: Final answer
    x = 1,434.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.