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Finding the Fourth Proportional to 2,579.99, 3,869.98 and 731.30

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Solution

The fourth proportional to 2,579.99, 3,869.98 and 731.30 is: 1,096.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.99 : 3,869.98 = 731.30 : x
  2. Step 2: Convert to fraction form
    2,579.99/3,869.98 = 731.30/x
  3. Step 3: Cross multiply
    2,579.99x = 3,869.98 × 731.30
  4. Step 4: Simplify right side
    2,579.99x = 2,830,095.20
  5. Step 5: Solve for x
    x = 2,830,095.20/2,579.99
  6. Step 6: Final answer
    x = 1,096.94

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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.