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Finding the Fourth Proportional to 3,608.73, 4,978.67 and 2,666.79

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Solution

The fourth proportional to 3,608.73, 4,978.67 and 2,666.79 is: 3,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.73 : 4,978.67 = 2,666.79 : x
  2. Step 2: Convert to fraction form
    3,608.73/4,978.67 = 2,666.79/x
  3. Step 3: Cross multiply
    3,608.73x = 4,978.67 × 2,666.79
  4. Step 4: Simplify right side
    3,608.73x = 13,277,054.04
  5. Step 5: Solve for x
    x = 13,277,054.04/3,608.73
  6. Step 6: Final answer
    x = 3,679.15

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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.