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Finding the Fourth Proportional to 801.10, 1,105.53 and 451.81

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Solution

The fourth proportional to 801.10, 1,105.53 and 451.81 is: 623.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.10 : 1,105.53 = 451.81 : x
  2. Step 2: Convert to fraction form
    801.10/1,105.53 = 451.81/x
  3. Step 3: Cross multiply
    801.10x = 1,105.53 × 451.81
  4. Step 4: Simplify right side
    801.10x = 499,489.51
  5. Step 5: Solve for x
    x = 499,489.51/801.10
  6. Step 6: Final answer
    x = 623.50

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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.