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Finding the Fourth Proportional to 826, 1,237.45 and 414.66

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Solution

The fourth proportional to 826, 1,237.45 and 414.66 is: 621.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    826 : 1,237.45 = 414.66 : x
  2. Step 2: Convert to fraction form
    826/1,237.45 = 414.66/x
  3. Step 3: Cross multiply
    826x = 1,237.45 × 414.66
  4. Step 4: Simplify right side
    826x = 513,121.02
  5. Step 5: Solve for x
    x = 513,121.02/826
  6. Step 6: Final answer
    x = 621.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.