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Finding the Fourth Proportional to 661.01, 991.47 and 250.22

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Solution

The fourth proportional to 661.01, 991.47 and 250.22 is: 375.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.01 : 991.47 = 250.22 : x
  2. Step 2: Convert to fraction form
    661.01/991.47 = 250.22/x
  3. Step 3: Cross multiply
    661.01x = 991.47 × 250.22
  4. Step 4: Simplify right side
    661.01x = 248,085.62
  5. Step 5: Solve for x
    x = 248,085.62/661.01
  6. Step 6: Final answer
    x = 375.31

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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.