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Finding the Fourth Proportional to 969.64, 1,335.84 and 674.39

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Solution

The fourth proportional to 969.64, 1,335.84 and 674.39 is: 929.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.64 : 1,335.84 = 674.39 : x
  2. Step 2: Convert to fraction form
    969.64/1,335.84 = 674.39/x
  3. Step 3: Cross multiply
    969.64x = 1,335.84 × 674.39
  4. Step 4: Simplify right side
    969.64x = 900,877.14
  5. Step 5: Solve for x
    x = 900,877.14/969.64
  6. Step 6: Final answer
    x = 929.08

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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.