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Finding the Fourth Proportional to 2,900.79, 4,001.67 and 1,721.02

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Solution

The fourth proportional to 2,900.79, 4,001.67 and 1,721.02 is: 2,374.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.79 : 4,001.67 = 1,721.02 : x
  2. Step 2: Convert to fraction form
    2,900.79/4,001.67 = 1,721.02/x
  3. Step 3: Cross multiply
    2,900.79x = 4,001.67 × 1,721.02
  4. Step 4: Simplify right side
    2,900.79x = 6,886,965.56
  5. Step 5: Solve for x
    x = 6,886,965.56/2,900.79
  6. Step 6: Final answer
    x = 2,374.17

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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.