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Finding the Fourth Proportional to 969.60, 1,338.43 and 675.03

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Solution

The fourth proportional to 969.60, 1,338.43 and 675.03 is: 931.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.60 : 1,338.43 = 675.03 : x
  2. Step 2: Convert to fraction form
    969.60/1,338.43 = 675.03/x
  3. Step 3: Cross multiply
    969.60x = 1,338.43 × 675.03
  4. Step 4: Simplify right side
    969.60x = 903,480.40
  5. Step 5: Solve for x
    x = 903,480.40/969.60
  6. Step 6: Final answer
    x = 931.81

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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.