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Finding the Fourth Proportional to 969.22, 1,338.73 and 703.24

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Solution

The fourth proportional to 969.22, 1,338.73 and 703.24 is: 971.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.22 : 1,338.73 = 703.24 : x
  2. Step 2: Convert to fraction form
    969.22/1,338.73 = 703.24/x
  3. Step 3: Cross multiply
    969.22x = 1,338.73 × 703.24
  4. Step 4: Simplify right side
    969.22x = 941,440.03
  5. Step 5: Solve for x
    x = 941,440.03/969.22
  6. Step 6: Final answer
    x = 971.34

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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.