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Finding the Fourth Proportional to 968.89, 1,336.89 and 674.05

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Solution

The fourth proportional to 968.89, 1,336.89 and 674.05 is: 930.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.89 : 1,336.89 = 674.05 : x
  2. Step 2: Convert to fraction form
    968.89/1,336.89 = 674.05/x
  3. Step 3: Cross multiply
    968.89x = 1,336.89 × 674.05
  4. Step 4: Simplify right side
    968.89x = 901,130.70
  5. Step 5: Solve for x
    x = 901,130.70/968.89
  6. Step 6: Final answer
    x = 930.07

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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.