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Finding the Fourth Proportional to 576.40, 863.65 and 359.53

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Solution

The fourth proportional to 576.40, 863.65 and 359.53 is: 538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.40 : 863.65 = 359.53 : x
  2. Step 2: Convert to fraction form
    576.40/863.65 = 359.53/x
  3. Step 3: Cross multiply
    576.40x = 863.65 × 359.53
  4. Step 4: Simplify right side
    576.40x = 310,508.08
  5. Step 5: Solve for x
    x = 310,508.08/576.40
  6. Step 6: Final answer
    x = 538.70

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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.