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Finding the Fourth Proportional to 659.36, 989.49 and 440.27

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Solution

The fourth proportional to 659.36, 989.49 and 440.27 is: 660.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.36 : 989.49 = 440.27 : x
  2. Step 2: Convert to fraction form
    659.36/989.49 = 440.27/x
  3. Step 3: Cross multiply
    659.36x = 989.49 × 440.27
  4. Step 4: Simplify right side
    659.36x = 435,637.81
  5. Step 5: Solve for x
    x = 435,637.81/659.36
  6. Step 6: Final answer
    x = 660.70

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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.