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Finding the Fourth Proportional to 576.11, 864.16 and 320.15

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Solution

The fourth proportional to 576.11, 864.16 and 320.15 is: 480.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.11 : 864.16 = 320.15 : x
  2. Step 2: Convert to fraction form
    576.11/864.16 = 320.15/x
  3. Step 3: Cross multiply
    576.11x = 864.16 × 320.15
  4. Step 4: Simplify right side
    576.11x = 276,655.70
  5. Step 5: Solve for x
    x = 276,655.70/576.11
  6. Step 6: Final answer
    x = 480.22

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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.