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Finding the Fourth Proportional to 564.49, 845.25 and 390.63

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Solution

The fourth proportional to 564.49, 845.25 and 390.63 is: 584.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.49 : 845.25 = 390.63 : x
  2. Step 2: Convert to fraction form
    564.49/845.25 = 390.63/x
  3. Step 3: Cross multiply
    564.49x = 845.25 × 390.63
  4. Step 4: Simplify right side
    564.49x = 330,180.01
  5. Step 5: Solve for x
    x = 330,180.01/564.49
  6. Step 6: Final answer
    x = 584.92

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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.