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Finding the Fourth Proportional to 848.28, 1,170.68 and 789.96

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Solution

The fourth proportional to 848.28, 1,170.68 and 789.96 is: 1,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.28 : 1,170.68 = 789.96 : x
  2. Step 2: Convert to fraction form
    848.28/1,170.68 = 789.96/x
  3. Step 3: Cross multiply
    848.28x = 1,170.68 × 789.96
  4. Step 4: Simplify right side
    848.28x = 924,786.42
  5. Step 5: Solve for x
    x = 924,786.42/848.28
  6. Step 6: Final answer
    x = 1,090.19

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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.