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Finding the Fourth Proportional to 2,092.70, 3,139.05 and 999.20

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Solution

The fourth proportional to 2,092.70, 3,139.05 and 999.20 is: 1,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.70 : 3,139.05 = 999.20 : x
  2. Step 2: Convert to fraction form
    2,092.70/3,139.05 = 999.20/x
  3. Step 3: Cross multiply
    2,092.70x = 3,139.05 × 999.20
  4. Step 4: Simplify right side
    2,092.70x = 3,136,538.76
  5. Step 5: Solve for x
    x = 3,136,538.76/2,092.70
  6. Step 6: Final answer
    x = 1,498.80

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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.