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Finding the Fourth Proportional to 3,666.78, 5,060.14 and 1,988.22

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Solution

The fourth proportional to 3,666.78, 5,060.14 and 1,988.22 is: 2,743.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,666.78 : 5,060.14 = 1,988.22 : x
  2. Step 2: Convert to fraction form
    3,666.78/5,060.14 = 1,988.22/x
  3. Step 3: Cross multiply
    3,666.78x = 5,060.14 × 1,988.22
  4. Step 4: Simplify right side
    3,666.78x = 10,060,685.56
  5. Step 5: Solve for x
    x = 10,060,685.56/3,666.78
  6. Step 6: Final answer
    x = 2,743.74

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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.