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Finding the Fourth Proportional to 659.35, 988.45 and 248.38

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Solution

The fourth proportional to 659.35, 988.45 and 248.38 is: 372.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.35 : 988.45 = 248.38 : x
  2. Step 2: Convert to fraction form
    659.35/988.45 = 248.38/x
  3. Step 3: Cross multiply
    659.35x = 988.45 × 248.38
  4. Step 4: Simplify right side
    659.35x = 245,511.21
  5. Step 5: Solve for x
    x = 245,511.21/659.35
  6. Step 6: Final answer
    x = 372.35

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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.