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Finding the Fourth Proportional to 514.90, 773.51 and 445.74

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Solution

The fourth proportional to 514.90, 773.51 and 445.74 is: 669.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.90 : 773.51 = 445.74 : x
  2. Step 2: Convert to fraction form
    514.90/773.51 = 445.74/x
  3. Step 3: Cross multiply
    514.90x = 773.51 × 445.74
  4. Step 4: Simplify right side
    514.90x = 344,784.35
  5. Step 5: Solve for x
    x = 344,784.35/514.90
  6. Step 6: Final answer
    x = 669.61

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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.