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Finding the Fourth Proportional to 494.19, 682.07 and 328.55

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Solution

The fourth proportional to 494.19, 682.07 and 328.55 is: 453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.19 : 682.07 = 328.55 : x
  2. Step 2: Convert to fraction form
    494.19/682.07 = 328.55/x
  3. Step 3: Cross multiply
    494.19x = 682.07 × 328.55
  4. Step 4: Simplify right side
    494.19x = 224,089.05
  5. Step 5: Solve for x
    x = 224,089.05/494.19
  6. Step 6: Final answer
    x = 453.45

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.