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Finding the Fourth Proportional to 855.74, 1,181.04 and 634.34

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Solution

The fourth proportional to 855.74, 1,181.04 and 634.34 is: 875.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.74 : 1,181.04 = 634.34 : x
  2. Step 2: Convert to fraction form
    855.74/1,181.04 = 634.34/x
  3. Step 3: Cross multiply
    855.74x = 1,181.04 × 634.34
  4. Step 4: Simplify right side
    855.74x = 749,180.91
  5. Step 5: Solve for x
    x = 749,180.91/855.74
  6. Step 6: Final answer
    x = 875.48

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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.