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Finding the Fourth Proportional to 2,666.44, 3,986.20 and 2,388.20

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Solution

The fourth proportional to 2,666.44, 3,986.20 and 2,388.20 is: 3,570.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.44 : 3,986.20 = 2,388.20 : x
  2. Step 2: Convert to fraction form
    2,666.44/3,986.20 = 2,388.20/x
  3. Step 3: Cross multiply
    2,666.44x = 3,986.20 × 2,388.20
  4. Step 4: Simplify right side
    2,666.44x = 9,519,842.84
  5. Step 5: Solve for x
    x = 9,519,842.84/2,666.44
  6. Step 6: Final answer
    x = 3,570.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.