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Finding the Fourth Proportional to 581.22, 871.22 and 256.55

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Solution

The fourth proportional to 581.22, 871.22 and 256.55 is: 384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.22 : 871.22 = 256.55 : x
  2. Step 2: Convert to fraction form
    581.22/871.22 = 256.55/x
  3. Step 3: Cross multiply
    581.22x = 871.22 × 256.55
  4. Step 4: Simplify right side
    581.22x = 223,507.78
  5. Step 5: Solve for x
    x = 223,507.78/581.22
  6. Step 6: Final answer
    x = 384.55

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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.