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Finding the Fourth Proportional to 659.63, 988.99 and 248.66

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Solution

The fourth proportional to 659.63, 988.99 and 248.66 is: 372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.63 : 988.99 = 248.66 : x
  2. Step 2: Convert to fraction form
    659.63/988.99 = 248.66/x
  3. Step 3: Cross multiply
    659.63x = 988.99 × 248.66
  4. Step 4: Simplify right side
    659.63x = 245,922.25
  5. Step 5: Solve for x
    x = 245,922.25/659.63
  6. Step 6: Final answer
    x = 372.82

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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.