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Finding the Fourth Proportional to 3,392.70, 4,681.69 and 1,900.61

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Solution

The fourth proportional to 3,392.70, 4,681.69 and 1,900.61 is: 2,622.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.70 : 4,681.69 = 1,900.61 : x
  2. Step 2: Convert to fraction form
    3,392.70/4,681.69 = 1,900.61/x
  3. Step 3: Cross multiply
    3,392.70x = 4,681.69 × 1,900.61
  4. Step 4: Simplify right side
    3,392.70x = 8,898,066.83
  5. Step 5: Solve for x
    x = 8,898,066.83/3,392.70
  6. Step 6: Final answer
    x = 2,622.71

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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.