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Finding the Fourth Proportional to 439.36, 659.52 and 371.20

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Solution

The fourth proportional to 439.36, 659.52 and 371.20 is: 557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.36 : 659.52 = 371.20 : x
  2. Step 2: Convert to fraction form
    439.36/659.52 = 371.20/x
  3. Step 3: Cross multiply
    439.36x = 659.52 × 371.20
  4. Step 4: Simplify right side
    439.36x = 244,813.82
  5. Step 5: Solve for x
    x = 244,813.82/439.36
  6. Step 6: Final answer
    x = 557.21

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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.