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Finding the Fourth Proportional to 1,977.44, 2,966.04 and 661.08

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Solution

The fourth proportional to 1,977.44, 2,966.04 and 661.08 is: 991.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.44 : 2,966.04 = 661.08 : x
  2. Step 2: Convert to fraction form
    1,977.44/2,966.04 = 661.08/x
  3. Step 3: Cross multiply
    1,977.44x = 2,966.04 × 661.08
  4. Step 4: Simplify right side
    1,977.44x = 1,960,789.72
  5. Step 5: Solve for x
    x = 1,960,789.72/1,977.44
  6. Step 6: Final answer
    x = 991.58

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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.