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Finding the Fourth Proportional to 969.22, 1,337.61 and 591.09

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Solution

The fourth proportional to 969.22, 1,337.61 and 591.09 is: 815.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.22 : 1,337.61 = 591.09 : x
  2. Step 2: Convert to fraction form
    969.22/1,337.61 = 591.09/x
  3. Step 3: Cross multiply
    969.22x = 1,337.61 × 591.09
  4. Step 4: Simplify right side
    969.22x = 790,647.89
  5. Step 5: Solve for x
    x = 790,647.89/969.22
  6. Step 6: Final answer
    x = 815.76

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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.