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Finding the Fourth Proportional to 869.17, 1,308.45 and 793.84

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Solution

The fourth proportional to 869.17, 1,308.45 and 793.84 is: 1,195.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.17 : 1,308.45 = 793.84 : x
  2. Step 2: Convert to fraction form
    869.17/1,308.45 = 793.84/x
  3. Step 3: Cross multiply
    869.17x = 1,308.45 × 793.84
  4. Step 4: Simplify right side
    869.17x = 1,038,699.95
  5. Step 5: Solve for x
    x = 1,038,699.95/869.17
  6. Step 6: Final answer
    x = 1,195.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.