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Finding the Fourth Proportional to 910.83, 1,257.29 and 579.44

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Solution

The fourth proportional to 910.83, 1,257.29 and 579.44 is: 799.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.83 : 1,257.29 = 579.44 : x
  2. Step 2: Convert to fraction form
    910.83/1,257.29 = 579.44/x
  3. Step 3: Cross multiply
    910.83x = 1,257.29 × 579.44
  4. Step 4: Simplify right side
    910.83x = 728,524.12
  5. Step 5: Solve for x
    x = 728,524.12/910.83
  6. Step 6: Final answer
    x = 799.85

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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.