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Finding the Fourth Proportional to 1,747.26, 2,410.91 and 990.99

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Solution

The fourth proportional to 1,747.26, 2,410.91 and 990.99 is: 1,367.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,747.26 : 2,410.91 = 990.99 : x
  2. Step 2: Convert to fraction form
    1,747.26/2,410.91 = 990.99/x
  3. Step 3: Cross multiply
    1,747.26x = 2,410.91 × 990.99
  4. Step 4: Simplify right side
    1,747.26x = 2,389,182.75
  5. Step 5: Solve for x
    x = 2,389,182.75/1,747.26
  6. Step 6: Final answer
    x = 1,367.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.