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Finding the Fourth Proportional to 661.87, 992.69 and 245.35

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Solution

The fourth proportional to 661.87, 992.69 and 245.35 is: 367.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.87 : 992.69 = 245.35 : x
  2. Step 2: Convert to fraction form
    661.87/992.69 = 245.35/x
  3. Step 3: Cross multiply
    661.87x = 992.69 × 245.35
  4. Step 4: Simplify right side
    661.87x = 243,557.43
  5. Step 5: Solve for x
    x = 243,557.43/661.87
  6. Step 6: Final answer
    x = 367.98

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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.