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Finding the Fourth Proportional to 576.72, 864.27 and 490.86

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Solution

The fourth proportional to 576.72, 864.27 and 490.86 is: 735.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.72 : 864.27 = 490.86 : x
  2. Step 2: Convert to fraction form
    576.72/864.27 = 490.86/x
  3. Step 3: Cross multiply
    576.72x = 864.27 × 490.86
  4. Step 4: Simplify right side
    576.72x = 424,235.57
  5. Step 5: Solve for x
    x = 424,235.57/576.72
  6. Step 6: Final answer
    x = 735.60

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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.