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Finding the Fourth Proportional to 3,389.78, 4,677.82 and 1,974.31

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Solution

The fourth proportional to 3,389.78, 4,677.82 and 1,974.31 is: 2,724.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.78 : 4,677.82 = 1,974.31 : x
  2. Step 2: Convert to fraction form
    3,389.78/4,677.82 = 1,974.31/x
  3. Step 3: Cross multiply
    3,389.78x = 4,677.82 × 1,974.31
  4. Step 4: Simplify right side
    3,389.78x = 9,235,450.17
  5. Step 5: Solve for x
    x = 9,235,450.17/3,389.78
  6. Step 6: Final answer
    x = 2,724.50

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1.5x scale

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.