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Finding the Fourth Proportional to 3,147.53, 4,720.99 and 956.28

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Solution

The fourth proportional to 3,147.53, 4,720.99 and 956.28 is: 1,434.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.53 : 4,720.99 = 956.28 : x
  2. Step 2: Convert to fraction form
    3,147.53/4,720.99 = 956.28/x
  3. Step 3: Cross multiply
    3,147.53x = 4,720.99 × 956.28
  4. Step 4: Simplify right side
    3,147.53x = 4,514,588.32
  5. Step 5: Solve for x
    x = 4,514,588.32/3,147.53
  6. Step 6: Final answer
    x = 1,434.33

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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.