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Finding the Fourth Proportional to 564.63, 779.28 and 331.77

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Solution

The fourth proportional to 564.63, 779.28 and 331.77 is: 457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.63 : 779.28 = 331.77 : x
  2. Step 2: Convert to fraction form
    564.63/779.28 = 331.77/x
  3. Step 3: Cross multiply
    564.63x = 779.28 × 331.77
  4. Step 4: Simplify right side
    564.63x = 258,541.73
  5. Step 5: Solve for x
    x = 258,541.73/564.63
  6. Step 6: Final answer
    x = 457.90

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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.