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Finding the Fourth Proportional to 581.50, 872.55 and 216.39

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Solution

The fourth proportional to 581.50, 872.55 and 216.39 is: 324.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.50 : 872.55 = 216.39 : x
  2. Step 2: Convert to fraction form
    581.50/872.55 = 216.39/x
  3. Step 3: Cross multiply
    581.50x = 872.55 × 216.39
  4. Step 4: Simplify right side
    581.50x = 188,811.09
  5. Step 5: Solve for x
    x = 188,811.09/581.50
  6. Step 6: Final answer
    x = 324.70

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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.