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Finding the Fourth Proportional to 869.58, 1,196.64 and 770.22

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Solution

The fourth proportional to 869.58, 1,196.64 and 770.22 is: 1,059.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.58 : 1,196.64 = 770.22 : x
  2. Step 2: Convert to fraction form
    869.58/1,196.64 = 770.22/x
  3. Step 3: Cross multiply
    869.58x = 1,196.64 × 770.22
  4. Step 4: Simplify right side
    869.58x = 921,676.06
  5. Step 5: Solve for x
    x = 921,676.06/869.58
  6. Step 6: Final answer
    x = 1,059.91

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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.