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Finding the Fourth Proportional to 4,242.76, 6,364.07 and 1,321.22

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Solution

The fourth proportional to 4,242.76, 6,364.07 and 1,321.22 is: 1,981.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,242.76 : 6,364.07 = 1,321.22 : x
  2. Step 2: Convert to fraction form
    4,242.76/6,364.07 = 1,321.22/x
  3. Step 3: Cross multiply
    4,242.76x = 6,364.07 × 1,321.22
  4. Step 4: Simplify right side
    4,242.76x = 8,408,329.96
  5. Step 5: Solve for x
    x = 8,408,329.96/4,242.76
  6. Step 6: Final answer
    x = 1,981.81

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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.