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Finding the Fourth Proportional to 659.72, 989.98 and 335.32

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Solution

The fourth proportional to 659.72, 989.98 and 335.32 is: 503.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.72 : 989.98 = 335.32 : x
  2. Step 2: Convert to fraction form
    659.72/989.98 = 335.32/x
  3. Step 3: Cross multiply
    659.72x = 989.98 × 335.32
  4. Step 4: Simplify right side
    659.72x = 331,960.09
  5. Step 5: Solve for x
    x = 331,960.09/659.72
  6. Step 6: Final answer
    x = 503.18

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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.