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Finding the Fourth Proportional to 576.10, 863.70 and 319.60

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Solution

The fourth proportional to 576.10, 863.70 and 319.60 is: 479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.10 : 863.70 = 319.60 : x
  2. Step 2: Convert to fraction form
    576.10/863.70 = 319.60/x
  3. Step 3: Cross multiply
    576.10x = 863.70 × 319.60
  4. Step 4: Simplify right side
    576.10x = 276,038.52
  5. Step 5: Solve for x
    x = 276,038.52/576.10
  6. Step 6: Final answer
    x = 479.15

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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.