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Finding the Fourth Proportional to 910.58, 1,255.82 and 674.87

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Solution

The fourth proportional to 910.58, 1,255.82 and 674.87 is: 930.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.58 : 1,255.82 = 674.87 : x
  2. Step 2: Convert to fraction form
    910.58/1,255.82 = 674.87/x
  3. Step 3: Cross multiply
    910.58x = 1,255.82 × 674.87
  4. Step 4: Simplify right side
    910.58x = 847,520.07
  5. Step 5: Solve for x
    x = 847,520.07/910.58
  6. Step 6: Final answer
    x = 930.74

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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.