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Finding the Fourth Proportional to 2,881, 3,974.69 and 1,685.60

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Solution

The fourth proportional to 2,881, 3,974.69 and 1,685.60 is: 2,325.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,881 : 3,974.69 = 1,685.60 : x
  2. Step 2: Convert to fraction form
    2,881/3,974.69 = 1,685.60/x
  3. Step 3: Cross multiply
    2,881x = 3,974.69 × 1,685.60
  4. Step 4: Simplify right side
    2,881x = 6,699,737.46
  5. Step 5: Solve for x
    x = 6,699,737.46/2,881
  6. Step 6: Final answer
    x = 2,325.49

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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.