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Finding the Fourth Proportional to 3,859.53, 5,326.15 and 2,180.86

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Solution

The fourth proportional to 3,859.53, 5,326.15 and 2,180.86 is: 3,009.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.53 : 5,326.15 = 2,180.86 : x
  2. Step 2: Convert to fraction form
    3,859.53/5,326.15 = 2,180.86/x
  3. Step 3: Cross multiply
    3,859.53x = 5,326.15 × 2,180.86
  4. Step 4: Simplify right side
    3,859.53x = 11,615,549.95
  5. Step 5: Solve for x
    x = 11,615,549.95/3,859.53
  6. Step 6: Final answer
    x = 3,009.58

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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.