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Finding the Fourth Proportional to 2,899.90, 4,001.34 and 1,720.90

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Solution

The fourth proportional to 2,899.90, 4,001.34 and 1,720.90 is: 2,374.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.90 : 4,001.34 = 1,720.90 : x
  2. Step 2: Convert to fraction form
    2,899.90/4,001.34 = 1,720.90/x
  3. Step 3: Cross multiply
    2,899.90x = 4,001.34 × 1,720.90
  4. Step 4: Simplify right side
    2,899.90x = 6,885,906.01
  5. Step 5: Solve for x
    x = 6,885,906.01/2,899.90
  6. Step 6: Final answer
    x = 2,374.53

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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.