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Finding the Fourth Proportional to 3,774.79, 5,209.80 and 3,608.69

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Solution

The fourth proportional to 3,774.79, 5,209.80 and 3,608.69 is: 4,980.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,774.79 : 5,209.80 = 3,608.69 : x
  2. Step 2: Convert to fraction form
    3,774.79/5,209.80 = 3,608.69/x
  3. Step 3: Cross multiply
    3,774.79x = 5,209.80 × 3,608.69
  4. Step 4: Simplify right side
    3,774.79x = 18,800,553.16
  5. Step 5: Solve for x
    x = 18,800,553.16/3,774.79
  6. Step 6: Final answer
    x = 4,980.56

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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.