Home / 1,372.12-2,056.42-669.49

Finding the Fourth Proportional to 1,372.12, 2,056.42 and 669.49

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Solution

The fourth proportional to 1,372.12, 2,056.42 and 669.49 is: 1,003.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.12 : 2,056.42 = 669.49 : x
  2. Step 2: Convert to fraction form
    1,372.12/2,056.42 = 669.49/x
  3. Step 3: Cross multiply
    1,372.12x = 2,056.42 × 669.49
  4. Step 4: Simplify right side
    1,372.12x = 1,376,759.89
  5. Step 5: Solve for x
    x = 1,376,759.89/1,372.12
  6. Step 6: Final answer
    x = 1,003.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.