Home / 1,217.03-1,680.57-969.46

Finding the Fourth Proportional to 1,217.03, 1,680.57 and 969.46

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Solution

The fourth proportional to 1,217.03, 1,680.57 and 969.46 is: 1,338.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.03 : 1,680.57 = 969.46 : x
  2. Step 2: Convert to fraction form
    1,217.03/1,680.57 = 969.46/x
  3. Step 3: Cross multiply
    1,217.03x = 1,680.57 × 969.46
  4. Step 4: Simplify right side
    1,217.03x = 1,629,241.55
  5. Step 5: Solve for x
    x = 1,629,241.55/1,217.03
  6. Step 6: Final answer
    x = 1,338.70

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1.5x scale

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.