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Finding the Fourth Proportional to 800.13, 1,104.39 and 521.06

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Solution

The fourth proportional to 800.13, 1,104.39 and 521.06 is: 719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.13 : 1,104.39 = 521.06 : x
  2. Step 2: Convert to fraction form
    800.13/1,104.39 = 521.06/x
  3. Step 3: Cross multiply
    800.13x = 1,104.39 × 521.06
  4. Step 4: Simplify right side
    800.13x = 575,450.85
  5. Step 5: Solve for x
    x = 575,450.85/800.13
  6. Step 6: Final answer
    x = 719.20

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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.