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Finding the Fourth Proportional to 3,860.72, 5,329.76 and 2,679.76

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Solution

The fourth proportional to 3,860.72, 5,329.76 and 2,679.76 is: 3,699.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.72 : 5,329.76 = 2,679.76 : x
  2. Step 2: Convert to fraction form
    3,860.72/5,329.76 = 2,679.76/x
  3. Step 3: Cross multiply
    3,860.72x = 5,329.76 × 2,679.76
  4. Step 4: Simplify right side
    3,860.72x = 14,282,477.66
  5. Step 5: Solve for x
    x = 14,282,477.66/3,860.72
  6. Step 6: Final answer
    x = 3,699.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.