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Finding the Fourth Proportional to 3,361.40, 4,638.68 and 1,869.14

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Solution

The fourth proportional to 3,361.40, 4,638.68 and 1,869.14 is: 2,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,361.40 : 4,638.68 = 1,869.14 : x
  2. Step 2: Convert to fraction form
    3,361.40/4,638.68 = 1,869.14/x
  3. Step 3: Cross multiply
    3,361.40x = 4,638.68 × 1,869.14
  4. Step 4: Simplify right side
    3,361.40x = 8,670,323.81
  5. Step 5: Solve for x
    x = 8,670,323.81/3,361.40
  6. Step 6: Final answer
    x = 2,579.38

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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.