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Finding the Fourth Proportional to 965.94, 1,335.20 and 889.40

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Solution

The fourth proportional to 965.94, 1,335.20 and 889.40 is: 1,229.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.94 : 1,335.20 = 889.40 : x
  2. Step 2: Convert to fraction form
    965.94/1,335.20 = 889.40/x
  3. Step 3: Cross multiply
    965.94x = 1,335.20 × 889.40
  4. Step 4: Simplify right side
    965.94x = 1,187,515.76
  5. Step 5: Solve for x
    x = 1,187,515.76/965.94
  6. Step 6: Final answer
    x = 1,229.39

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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.