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Finding the Fourth Proportional to 661.22, 985.92 and 637.52

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Solution

The fourth proportional to 661.22, 985.92 and 637.52 is: 950.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.22 : 985.92 = 637.52 : x
  2. Step 2: Convert to fraction form
    661.22/985.92 = 637.52/x
  3. Step 3: Cross multiply
    661.22x = 985.92 × 637.52
  4. Step 4: Simplify right side
    661.22x = 628,543.72
  5. Step 5: Solve for x
    x = 628,543.72/661.22
  6. Step 6: Final answer
    x = 950.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.