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Finding the Fourth Proportional to 514.20, 771.30 and 360.30

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Solution

The fourth proportional to 514.20, 771.30 and 360.30 is: 540.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.20 : 771.30 = 360.30 : x
  2. Step 2: Convert to fraction form
    514.20/771.30 = 360.30/x
  3. Step 3: Cross multiply
    514.20x = 771.30 × 360.30
  4. Step 4: Simplify right side
    514.20x = 277,899.39
  5. Step 5: Solve for x
    x = 277,899.39/514.20
  6. Step 6: Final answer
    x = 540.45

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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.