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Finding the Fourth Proportional to 949.44, 1,310.37 and 684.78

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Solution

The fourth proportional to 949.44, 1,310.37 and 684.78 is: 945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.44 : 1,310.37 = 684.78 : x
  2. Step 2: Convert to fraction form
    949.44/1,310.37 = 684.78/x
  3. Step 3: Cross multiply
    949.44x = 1,310.37 × 684.78
  4. Step 4: Simplify right side
    949.44x = 897,315.17
  5. Step 5: Solve for x
    x = 897,315.17/949.44
  6. Step 6: Final answer
    x = 945.10

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Double scale
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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.