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Finding the Fourth Proportional to 2,355.80, 3,531.20 and 794.39

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Solution

The fourth proportional to 2,355.80, 3,531.20 and 794.39 is: 1,190.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,355.80 : 3,531.20 = 794.39 : x
  2. Step 2: Convert to fraction form
    2,355.80/3,531.20 = 794.39/x
  3. Step 3: Cross multiply
    2,355.80x = 3,531.20 × 794.39
  4. Step 4: Simplify right side
    2,355.80x = 2,805,128.34
  5. Step 5: Solve for x
    x = 2,805,128.34/2,355.80
  6. Step 6: Final answer
    x = 1,190.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.