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Finding the Fourth Proportional to 659.26, 987.98 and 247.98

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Solution

The fourth proportional to 659.26, 987.98 and 247.98 is: 371.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.26 : 987.98 = 247.98 : x
  2. Step 2: Convert to fraction form
    659.26/987.98 = 247.98/x
  3. Step 3: Cross multiply
    659.26x = 987.98 × 247.98
  4. Step 4: Simplify right side
    659.26x = 244,999.28
  5. Step 5: Solve for x
    x = 244,999.28/659.26
  6. Step 6: Final answer
    x = 371.63

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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.