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Finding the Fourth Proportional to 663.99, 995.95 and 247.61

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Solution

The fourth proportional to 663.99, 995.95 and 247.61 is: 371.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.99 : 995.95 = 247.61 : x
  2. Step 2: Convert to fraction form
    663.99/995.95 = 247.61/x
  3. Step 3: Cross multiply
    663.99x = 995.95 × 247.61
  4. Step 4: Simplify right side
    663.99x = 246,602.51
  5. Step 5: Solve for x
    x = 246,602.51/663.99
  6. Step 6: Final answer
    x = 371.39

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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.