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Finding the Fourth Proportional to 581.60, 872.94 and 321.86

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Solution

The fourth proportional to 581.60, 872.94 and 321.86 is: 483.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.60 : 872.94 = 321.86 : x
  2. Step 2: Convert to fraction form
    581.60/872.94 = 321.86/x
  3. Step 3: Cross multiply
    581.60x = 872.94 × 321.86
  4. Step 4: Simplify right side
    581.60x = 280,964.47
  5. Step 5: Solve for x
    x = 280,964.47/581.60
  6. Step 6: Final answer
    x = 483.09

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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.