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Finding the Fourth Proportional to 659.58, 989.50 and 249

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Solution

The fourth proportional to 659.58, 989.50 and 249 is: 373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.58 : 989.50 = 249 : x
  2. Step 2: Convert to fraction form
    659.58/989.50 = 249/x
  3. Step 3: Cross multiply
    659.58x = 989.50 × 249
  4. Step 4: Simplify right side
    659.58x = 246,385.50
  5. Step 5: Solve for x
    x = 246,385.50/659.58
  6. Step 6: Final answer
    x = 373.55

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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.