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Finding the Fourth Proportional to 801.45, 1,105.90 and 452.07

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Solution

The fourth proportional to 801.45, 1,105.90 and 452.07 is: 623.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.45 : 1,105.90 = 452.07 : x
  2. Step 2: Convert to fraction form
    801.45/1,105.90 = 452.07/x
  3. Step 3: Cross multiply
    801.45x = 1,105.90 × 452.07
  4. Step 4: Simplify right side
    801.45x = 499,944.21
  5. Step 5: Solve for x
    x = 499,944.21/801.45
  6. Step 6: Final answer
    x = 623.80

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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.