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Finding the Fourth Proportional to 801.03, 1,105.02 and 521.22

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Solution

The fourth proportional to 801.03, 1,105.02 and 521.22 is: 719.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.03 : 1,105.02 = 521.22 : x
  2. Step 2: Convert to fraction form
    801.03/1,105.02 = 521.22/x
  3. Step 3: Cross multiply
    801.03x = 1,105.02 × 521.22
  4. Step 4: Simplify right side
    801.03x = 575,958.52
  5. Step 5: Solve for x
    x = 575,958.52/801.03
  6. Step 6: Final answer
    x = 719.02

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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.