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Finding the Fourth Proportional to 659.70, 989.80 and 248.94

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Solution

The fourth proportional to 659.70, 989.80 and 248.94 is: 373.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.70 : 989.80 = 248.94 : x
  2. Step 2: Convert to fraction form
    659.70/989.80 = 248.94/x
  3. Step 3: Cross multiply
    659.70x = 989.80 × 248.94
  4. Step 4: Simplify right side
    659.70x = 246,400.81
  5. Step 5: Solve for x
    x = 246,400.81/659.70
  6. Step 6: Final answer
    x = 373.50

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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.