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Finding the Fourth Proportional to 661.52, 991.56 and 444.08

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Solution

The fourth proportional to 661.52, 991.56 and 444.08 is: 665.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.52 : 991.56 = 444.08 : x
  2. Step 2: Convert to fraction form
    661.52/991.56 = 444.08/x
  3. Step 3: Cross multiply
    661.52x = 991.56 × 444.08
  4. Step 4: Simplify right side
    661.52x = 440,331.96
  5. Step 5: Solve for x
    x = 440,331.96/661.52
  6. Step 6: Final answer
    x = 665.64

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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.