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Finding the Fourth Proportional to 1,349.01, 2,020.48 and 691.09

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Solution

The fourth proportional to 1,349.01, 2,020.48 and 691.09 is: 1,035.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.01 : 2,020.48 = 691.09 : x
  2. Step 2: Convert to fraction form
    1,349.01/2,020.48 = 691.09/x
  3. Step 3: Cross multiply
    1,349.01x = 2,020.48 × 691.09
  4. Step 4: Simplify right side
    1,349.01x = 1,396,325.02
  5. Step 5: Solve for x
    x = 1,396,325.02/1,349.01
  6. Step 6: Final answer
    x = 1,035.07

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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.