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Finding the Fourth Proportional to 1,486.81, 2,230.22 and 512.99

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Solution

The fourth proportional to 1,486.81, 2,230.22 and 512.99 is: 769.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.81 : 2,230.22 = 512.99 : x
  2. Step 2: Convert to fraction form
    1,486.81/2,230.22 = 512.99/x
  3. Step 3: Cross multiply
    1,486.81x = 2,230.22 × 512.99
  4. Step 4: Simplify right side
    1,486.81x = 1,144,080.56
  5. Step 5: Solve for x
    x = 1,144,080.56/1,486.81
  6. Step 6: Final answer
    x = 769.49

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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.