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Finding the Fourth Proportional to 661.64, 993.62 and 635.52

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Solution

The fourth proportional to 661.64, 993.62 and 635.52 is: 954.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.64 : 993.62 = 635.52 : x
  2. Step 2: Convert to fraction form
    661.64/993.62 = 635.52/x
  3. Step 3: Cross multiply
    661.64x = 993.62 × 635.52
  4. Step 4: Simplify right side
    661.64x = 631,465.38
  5. Step 5: Solve for x
    x = 631,465.38/661.64
  6. Step 6: Final answer
    x = 954.39

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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.