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Finding the Fourth Proportional to 564.81, 779.43 and 518.37

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Solution

The fourth proportional to 564.81, 779.43 and 518.37 is: 715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.81 : 779.43 = 518.37 : x
  2. Step 2: Convert to fraction form
    564.81/779.43 = 518.37/x
  3. Step 3: Cross multiply
    564.81x = 779.43 × 518.37
  4. Step 4: Simplify right side
    564.81x = 404,035.07
  5. Step 5: Solve for x
    x = 404,035.07/564.81
  6. Step 6: Final answer
    x = 715.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.