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Finding the Fourth Proportional to 445.40, 669.62 and 396.76

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Solution

The fourth proportional to 445.40, 669.62 and 396.76 is: 596.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.40 : 669.62 = 396.76 : x
  2. Step 2: Convert to fraction form
    445.40/669.62 = 396.76/x
  3. Step 3: Cross multiply
    445.40x = 669.62 × 396.76
  4. Step 4: Simplify right side
    445.40x = 265,678.43
  5. Step 5: Solve for x
    x = 265,678.43/445.40
  6. Step 6: Final answer
    x = 596.49

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.