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Finding the Fourth Proportional to 564.67, 845.72 and 390.56

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Solution

The fourth proportional to 564.67, 845.72 and 390.56 is: 584.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.67 : 845.72 = 390.56 : x
  2. Step 2: Convert to fraction form
    564.67/845.72 = 390.56/x
  3. Step 3: Cross multiply
    564.67x = 845.72 × 390.56
  4. Step 4: Simplify right side
    564.67x = 330,299.69
  5. Step 5: Solve for x
    x = 330,299.69/564.67
  6. Step 6: Final answer
    x = 584.94

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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.