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Finding the Fourth Proportional to 485.26, 669.27 and 411.82

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Solution

The fourth proportional to 485.26, 669.27 and 411.82 is: 567.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.26 : 669.27 = 411.82 : x
  2. Step 2: Convert to fraction form
    485.26/669.27 = 411.82/x
  3. Step 3: Cross multiply
    485.26x = 669.27 × 411.82
  4. Step 4: Simplify right side
    485.26x = 275,618.77
  5. Step 5: Solve for x
    x = 275,618.77/485.26
  6. Step 6: Final answer
    x = 567.98

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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.