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Finding the Fourth Proportional to 1,986.18, 2,977.11 and 889.02

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Solution

The fourth proportional to 1,986.18, 2,977.11 and 889.02 is: 1,332.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.18 : 2,977.11 = 889.02 : x
  2. Step 2: Convert to fraction form
    1,986.18/2,977.11 = 889.02/x
  3. Step 3: Cross multiply
    1,986.18x = 2,977.11 × 889.02
  4. Step 4: Simplify right side
    1,986.18x = 2,646,710.33
  5. Step 5: Solve for x
    x = 2,646,710.33/1,986.18
  6. Step 6: Final answer
    x = 1,332.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.