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Finding the Fourth Proportional to 2,047.88, 3,071.75 and 661.29

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Solution

The fourth proportional to 2,047.88, 3,071.75 and 661.29 is: 991.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,047.88 : 3,071.75 = 661.29 : x
  2. Step 2: Convert to fraction form
    2,047.88/3,071.75 = 661.29/x
  3. Step 3: Cross multiply
    2,047.88x = 3,071.75 × 661.29
  4. Step 4: Simplify right side
    2,047.88x = 2,031,314.25
  5. Step 5: Solve for x
    x = 2,031,314.25/2,047.88
  6. Step 6: Final answer
    x = 991.91

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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.