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Finding the Fourth Proportional to 659.91, 989.68 and 248.91

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Solution

The fourth proportional to 659.91, 989.68 and 248.91 is: 373.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.91 : 989.68 = 248.91 : x
  2. Step 2: Convert to fraction form
    659.91/989.68 = 248.91/x
  3. Step 3: Cross multiply
    659.91x = 989.68 × 248.91
  4. Step 4: Simplify right side
    659.91x = 246,341.25
  5. Step 5: Solve for x
    x = 246,341.25/659.91
  6. Step 6: Final answer
    x = 373.30

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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.