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Finding the Fourth Proportional to 491.75, 733.80 and 439.82

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Solution

The fourth proportional to 491.75, 733.80 and 439.82 is: 656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.75 : 733.80 = 439.82 : x
  2. Step 2: Convert to fraction form
    491.75/733.80 = 439.82/x
  3. Step 3: Cross multiply
    491.75x = 733.80 × 439.82
  4. Step 4: Simplify right side
    491.75x = 322,734.05
  5. Step 5: Solve for x
    x = 322,734.05/491.75
  6. Step 6: Final answer
    x = 656.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.