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Finding the Fourth Proportional to 2,479.76, 3,428.64 and 2,168.48

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Solution

The fourth proportional to 2,479.76, 3,428.64 and 2,168.48 is: 2,998.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.76 : 3,428.64 = 2,168.48 : x
  2. Step 2: Convert to fraction form
    2,479.76/3,428.64 = 2,168.48/x
  3. Step 3: Cross multiply
    2,479.76x = 3,428.64 × 2,168.48
  4. Step 4: Simplify right side
    2,479.76x = 7,434,937.27
  5. Step 5: Solve for x
    x = 7,434,937.27/2,479.76
  6. Step 6: Final answer
    x = 2,998.25

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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.