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Finding the Fourth Proportional to 564.26, 778.61 and 315.59

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Solution

The fourth proportional to 564.26, 778.61 and 315.59 is: 435.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.26 : 778.61 = 315.59 : x
  2. Step 2: Convert to fraction form
    564.26/778.61 = 315.59/x
  3. Step 3: Cross multiply
    564.26x = 778.61 × 315.59
  4. Step 4: Simplify right side
    564.26x = 245,718.43
  5. Step 5: Solve for x
    x = 245,718.43/564.26
  6. Step 6: Final answer
    x = 435.47

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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.