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Finding the Fourth Proportional to 2,899.96, 4,001.87 and 1,721

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Solution

The fourth proportional to 2,899.96, 4,001.87 and 1,721 is: 2,374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.96 : 4,001.87 = 1,721 : x
  2. Step 2: Convert to fraction form
    2,899.96/4,001.87 = 1,721/x
  3. Step 3: Cross multiply
    2,899.96x = 4,001.87 × 1,721
  4. Step 4: Simplify right side
    2,899.96x = 6,887,209.67
  5. Step 5: Solve for x
    x = 6,887,209.67/2,899.96
  6. Step 6: Final answer
    x = 2,374.94

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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.