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Finding the Fourth Proportional to 412.45, 569.16 and 225.91

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Solution

The fourth proportional to 412.45, 569.16 and 225.91 is: 311.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.45 : 569.16 = 225.91 : x
  2. Step 2: Convert to fraction form
    412.45/569.16 = 225.91/x
  3. Step 3: Cross multiply
    412.45x = 569.16 × 225.91
  4. Step 4: Simplify right side
    412.45x = 128,578.08
  5. Step 5: Solve for x
    x = 128,578.08/412.45
  6. Step 6: Final answer
    x = 311.74

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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.