Home / 1,372.08-2,056.29-505.56

Finding the Fourth Proportional to 1,372.08, 2,056.29 and 505.56

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Solution

The fourth proportional to 1,372.08, 2,056.29 and 505.56 is: 757.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.08 : 2,056.29 = 505.56 : x
  2. Step 2: Convert to fraction form
    1,372.08/2,056.29 = 505.56/x
  3. Step 3: Cross multiply
    1,372.08x = 2,056.29 × 505.56
  4. Step 4: Simplify right side
    1,372.08x = 1,039,577.97
  5. Step 5: Solve for x
    x = 1,039,577.97/1,372.08
  6. Step 6: Final answer
    x = 757.67

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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.