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Finding the Fourth Proportional to 669.06, 1,001.26 and 408.95

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Solution

The fourth proportional to 669.06, 1,001.26 and 408.95 is: 612.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.06 : 1,001.26 = 408.95 : x
  2. Step 2: Convert to fraction form
    669.06/1,001.26 = 408.95/x
  3. Step 3: Cross multiply
    669.06x = 1,001.26 × 408.95
  4. Step 4: Simplify right side
    669.06x = 409,464.54
  5. Step 5: Solve for x
    x = 409,464.54/669.06
  6. Step 6: Final answer
    x = 612.00

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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.