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Finding the Fourth Proportional to 3,859.96, 5,326.68 and 3,145.72

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Solution

The fourth proportional to 3,859.96, 5,326.68 and 3,145.72 is: 4,341.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.96 : 5,326.68 = 3,145.72 : x
  2. Step 2: Convert to fraction form
    3,859.96/5,326.68 = 3,145.72/x
  3. Step 3: Cross multiply
    3,859.96x = 5,326.68 × 3,145.72
  4. Step 4: Simplify right side
    3,859.96x = 16,756,243.81
  5. Step 5: Solve for x
    x = 16,756,243.81/3,859.96
  6. Step 6: Final answer
    x = 4,341.04

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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.