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Finding the Fourth Proportional to 3,608.71, 4,978.68 and 2,116.08

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Solution

The fourth proportional to 3,608.71, 4,978.68 and 2,116.08 is: 2,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.71 : 4,978.68 = 2,116.08 : x
  2. Step 2: Convert to fraction form
    3,608.71/4,978.68 = 2,116.08/x
  3. Step 3: Cross multiply
    3,608.71x = 4,978.68 × 2,116.08
  4. Step 4: Simplify right side
    3,608.71x = 10,535,277.24
  5. Step 5: Solve for x
    x = 10,535,277.24/3,608.71
  6. Step 6: Final answer
    x = 2,919.40

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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.