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Finding the Fourth Proportional to 581.45, 872.41 and 211.30

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Solution

The fourth proportional to 581.45, 872.41 and 211.30 is: 317.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.45 : 872.41 = 211.30 : x
  2. Step 2: Convert to fraction form
    581.45/872.41 = 211.30/x
  3. Step 3: Cross multiply
    581.45x = 872.41 × 211.30
  4. Step 4: Simplify right side
    581.45x = 184,340.23
  5. Step 5: Solve for x
    x = 184,340.23/581.45
  6. Step 6: Final answer
    x = 317.04

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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.