Home / 2,166.87-2,989.08-1,281.81

Finding the Fourth Proportional to 2,166.87, 2,989.08 and 1,281.81

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Solution

The fourth proportional to 2,166.87, 2,989.08 and 1,281.81 is: 1,768.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.87 : 2,989.08 = 1,281.81 : x
  2. Step 2: Convert to fraction form
    2,166.87/2,989.08 = 1,281.81/x
  3. Step 3: Cross multiply
    2,166.87x = 2,989.08 × 1,281.81
  4. Step 4: Simplify right side
    2,166.87x = 3,831,432.63
  5. Step 5: Solve for x
    x = 3,831,432.63/2,166.87
  6. Step 6: Final answer
    x = 1,768.19

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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.