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Finding the Fourth Proportional to 661.67, 993.53 and 632.45

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Solution

The fourth proportional to 661.67, 993.53 and 632.45 is: 949.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.67 : 993.53 = 632.45 : x
  2. Step 2: Convert to fraction form
    661.67/993.53 = 632.45/x
  3. Step 3: Cross multiply
    661.67x = 993.53 × 632.45
  4. Step 4: Simplify right side
    661.67x = 628,358.05
  5. Step 5: Solve for x
    x = 628,358.05/661.67
  6. Step 6: Final answer
    x = 949.65

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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.