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Finding the Fourth Proportional to 412.26, 569.20 and 317.58

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Solution

The fourth proportional to 412.26, 569.20 and 317.58 is: 438.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.26 : 569.20 = 317.58 : x
  2. Step 2: Convert to fraction form
    412.26/569.20 = 317.58/x
  3. Step 3: Cross multiply
    412.26x = 569.20 × 317.58
  4. Step 4: Simplify right side
    412.26x = 180,766.54
  5. Step 5: Solve for x
    x = 180,766.54/412.26
  6. Step 6: Final answer
    x = 438.48

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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.