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Finding the Fourth Proportional to 3,562.78, 4,916.67 and 1,990.90

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Solution

The fourth proportional to 3,562.78, 4,916.67 and 1,990.90 is: 2,747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,562.78 : 4,916.67 = 1,990.90 : x
  2. Step 2: Convert to fraction form
    3,562.78/4,916.67 = 1,990.90/x
  3. Step 3: Cross multiply
    3,562.78x = 4,916.67 × 1,990.90
  4. Step 4: Simplify right side
    3,562.78x = 9,788,598.30
  5. Step 5: Solve for x
    x = 9,788,598.30/3,562.78
  6. Step 6: Final answer
    x = 2,747.46

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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.