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Finding the Fourth Proportional to 2,900.75, 4,003.88 and 1,722.51

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Solution

The fourth proportional to 2,900.75, 4,003.88 and 1,722.51 is: 2,377.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.75 : 4,003.88 = 1,722.51 : x
  2. Step 2: Convert to fraction form
    2,900.75/4,003.88 = 1,722.51/x
  3. Step 3: Cross multiply
    2,900.75x = 4,003.88 × 1,722.51
  4. Step 4: Simplify right side
    2,900.75x = 6,896,714.73
  5. Step 5: Solve for x
    x = 6,896,714.73/2,900.75
  6. Step 6: Final answer
    x = 2,377.57

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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.