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Finding the Fourth Proportional to 3,490.72, 4,817.28 and 1,918.96

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Solution

The fourth proportional to 3,490.72, 4,817.28 and 1,918.96 is: 2,648.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.72 : 4,817.28 = 1,918.96 : x
  2. Step 2: Convert to fraction form
    3,490.72/4,817.28 = 1,918.96/x
  3. Step 3: Cross multiply
    3,490.72x = 4,817.28 × 1,918.96
  4. Step 4: Simplify right side
    3,490.72x = 9,244,167.63
  5. Step 5: Solve for x
    x = 9,244,167.63/3,490.72
  6. Step 6: Final answer
    x = 2,648.21

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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.