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Finding the Fourth Proportional to 938.58, 1,295.10 and 834.12

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Solution

The fourth proportional to 938.58, 1,295.10 and 834.12 is: 1,150.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.58 : 1,295.10 = 834.12 : x
  2. Step 2: Convert to fraction form
    938.58/1,295.10 = 834.12/x
  3. Step 3: Cross multiply
    938.58x = 1,295.10 × 834.12
  4. Step 4: Simplify right side
    938.58x = 1,080,268.81
  5. Step 5: Solve for x
    x = 1,080,268.81/938.58
  6. Step 6: Final answer
    x = 1,150.96

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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.