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Finding the Fourth Proportional to 564.68, 779.28 and 440.30

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Solution

The fourth proportional to 564.68, 779.28 and 440.30 is: 607.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.68 : 779.28 = 440.30 : x
  2. Step 2: Convert to fraction form
    564.68/779.28 = 440.30/x
  3. Step 3: Cross multiply
    564.68x = 779.28 × 440.30
  4. Step 4: Simplify right side
    564.68x = 343,116.98
  5. Step 5: Solve for x
    x = 343,116.98/564.68
  6. Step 6: Final answer
    x = 607.63

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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.