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Finding the Fourth Proportional to 576.83, 865.55 and 440.75

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Solution

The fourth proportional to 576.83, 865.55 and 440.75 is: 661.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.83 : 865.55 = 440.75 : x
  2. Step 2: Convert to fraction form
    576.83/865.55 = 440.75/x
  3. Step 3: Cross multiply
    576.83x = 865.55 × 440.75
  4. Step 4: Simplify right side
    576.83x = 381,491.16
  5. Step 5: Solve for x
    x = 381,491.16/576.83
  6. Step 6: Final answer
    x = 661.36

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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.