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Finding the Fourth Proportional to 3,151.26, 4,727.14 and 842.76

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Solution

The fourth proportional to 3,151.26, 4,727.14 and 842.76 is: 1,264.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.26 : 4,727.14 = 842.76 : x
  2. Step 2: Convert to fraction form
    3,151.26/4,727.14 = 842.76/x
  3. Step 3: Cross multiply
    3,151.26x = 4,727.14 × 842.76
  4. Step 4: Simplify right side
    3,151.26x = 3,983,844.51
  5. Step 5: Solve for x
    x = 3,983,844.51/3,151.26
  6. Step 6: Final answer
    x = 1,264.21

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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.