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Finding the Fourth Proportional to 3,562.79, 4,916.70 and 1,990.98

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Solution

The fourth proportional to 3,562.79, 4,916.70 and 1,990.98 is: 2,747.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,562.79 : 4,916.70 = 1,990.98 : x
  2. Step 2: Convert to fraction form
    3,562.79/4,916.70 = 1,990.98/x
  3. Step 3: Cross multiply
    3,562.79x = 4,916.70 × 1,990.98
  4. Step 4: Simplify right side
    3,562.79x = 9,789,051.37
  5. Step 5: Solve for x
    x = 9,789,051.37/3,562.79
  6. Step 6: Final answer
    x = 2,747.58

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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.