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Finding the Fourth Proportional to 576.19, 860.72 and 518.32

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Solution

The fourth proportional to 576.19, 860.72 and 518.32 is: 774.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.19 : 860.72 = 518.32 : x
  2. Step 2: Convert to fraction form
    576.19/860.72 = 518.32/x
  3. Step 3: Cross multiply
    576.19x = 860.72 × 518.32
  4. Step 4: Simplify right side
    576.19x = 446,128.39
  5. Step 5: Solve for x
    x = 446,128.39/576.19
  6. Step 6: Final answer
    x = 774.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.