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Finding the Fourth Proportional to 581.30, 871.86 and 170.40

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Solution

The fourth proportional to 581.30, 871.86 and 170.40 is: 255.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.30 : 871.86 = 170.40 : x
  2. Step 2: Convert to fraction form
    581.30/871.86 = 170.40/x
  3. Step 3: Cross multiply
    581.30x = 871.86 × 170.40
  4. Step 4: Simplify right side
    581.30x = 148,562.31
  5. Step 5: Solve for x
    x = 148,562.31/581.30
  6. Step 6: Final answer
    x = 255.57

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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.