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Finding the Fourth Proportional to 469.44, 645.84 and 411.12

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Solution

The fourth proportional to 469.44, 645.84 and 411.12 is: 565.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.44 : 645.84 = 411.12 : x
  2. Step 2: Convert to fraction form
    469.44/645.84 = 411.12/x
  3. Step 3: Cross multiply
    469.44x = 645.84 × 411.12
  4. Step 4: Simplify right side
    469.44x = 265,517.74
  5. Step 5: Solve for x
    x = 265,517.74/469.44
  6. Step 6: Final answer
    x = 565.61

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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.