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Finding the Fourth Proportional to 576.86, 865.76 and 303.21

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Solution

The fourth proportional to 576.86, 865.76 and 303.21 is: 455.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.86 : 865.76 = 303.21 : x
  2. Step 2: Convert to fraction form
    576.86/865.76 = 303.21/x
  3. Step 3: Cross multiply
    576.86x = 865.76 × 303.21
  4. Step 4: Simplify right side
    576.86x = 262,505.57
  5. Step 5: Solve for x
    x = 262,505.57/576.86
  6. Step 6: Final answer
    x = 455.06

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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.