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Finding the Fourth Proportional to 798.09, 1,101.90 and 713.80

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Solution

The fourth proportional to 798.09, 1,101.90 and 713.80 is: 985.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.09 : 1,101.90 = 713.80 : x
  2. Step 2: Convert to fraction form
    798.09/1,101.90 = 713.80/x
  3. Step 3: Cross multiply
    798.09x = 1,101.90 × 713.80
  4. Step 4: Simplify right side
    798.09x = 786,536.22
  5. Step 5: Solve for x
    x = 786,536.22/798.09
  6. Step 6: Final answer
    x = 985.52

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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.