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Finding the Fourth Proportional to 439.36, 659.04 and 165.45

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Solution

The fourth proportional to 439.36, 659.04 and 165.45 is: 248.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.36 : 659.04 = 165.45 : x
  2. Step 2: Convert to fraction form
    439.36/659.04 = 165.45/x
  3. Step 3: Cross multiply
    439.36x = 659.04 × 165.45
  4. Step 4: Simplify right side
    439.36x = 109,038.17
  5. Step 5: Solve for x
    x = 109,038.17/439.36
  6. Step 6: Final answer
    x = 248.18

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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.