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Finding the Fourth Proportional to 564.96, 847.44 and 321.60

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Solution

The fourth proportional to 564.96, 847.44 and 321.60 is: 482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.96 : 847.44 = 321.60 : x
  2. Step 2: Convert to fraction form
    564.96/847.44 = 321.60/x
  3. Step 3: Cross multiply
    564.96x = 847.44 × 321.60
  4. Step 4: Simplify right side
    564.96x = 272,536.70
  5. Step 5: Solve for x
    x = 272,536.70/564.96
  6. Step 6: Final answer
    x = 482.40

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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.