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Finding the Fourth Proportional to 3,479.76, 4,799.86 and 2,154.20

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Solution

The fourth proportional to 3,479.76, 4,799.86 and 2,154.20 is: 2,971.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.76 : 4,799.86 = 2,154.20 : x
  2. Step 2: Convert to fraction form
    3,479.76/4,799.86 = 2,154.20/x
  3. Step 3: Cross multiply
    3,479.76x = 4,799.86 × 2,154.20
  4. Step 4: Simplify right side
    3,479.76x = 10,339,829.03
  5. Step 5: Solve for x
    x = 10,339,829.03/3,479.76
  6. Step 6: Final answer
    x = 2,971.42

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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.