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Finding the Fourth Proportional to 3,421.01, 4,721.00 and 1,928.90

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Solution

The fourth proportional to 3,421.01, 4,721.00 and 1,928.90 is: 2,661.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.01 : 4,721.00 = 1,928.90 : x
  2. Step 2: Convert to fraction form
    3,421.01/4,721.00 = 1,928.90/x
  3. Step 3: Cross multiply
    3,421.01x = 4,721.00 × 1,928.90
  4. Step 4: Simplify right side
    3,421.01x = 9,106,339.06
  5. Step 5: Solve for x
    x = 9,106,339.06/3,421.01
  6. Step 6: Final answer
    x = 2,661.88

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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.