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Finding the Fourth Proportional to 2,312.85, 3,468.94 and 851.67

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Solution

The fourth proportional to 2,312.85, 3,468.94 and 851.67 is: 1,277.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.85 : 3,468.94 = 851.67 : x
  2. Step 2: Convert to fraction form
    2,312.85/3,468.94 = 851.67/x
  3. Step 3: Cross multiply
    2,312.85x = 3,468.94 × 851.67
  4. Step 4: Simplify right side
    2,312.85x = 2,954,392.13
  5. Step 5: Solve for x
    x = 2,954,392.13/2,312.85
  6. Step 6: Final answer
    x = 1,277.38

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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.