Home / 2,158.90-2,977.68-1,372.24

Finding the Fourth Proportional to 2,158.90, 2,977.68 and 1,372.24

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Solution

The fourth proportional to 2,158.90, 2,977.68 and 1,372.24 is: 1,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.90 : 2,977.68 = 1,372.24 : x
  2. Step 2: Convert to fraction form
    2,158.90/2,977.68 = 1,372.24/x
  3. Step 3: Cross multiply
    2,158.90x = 2,977.68 × 1,372.24
  4. Step 4: Simplify right side
    2,158.90x = 4,086,091.60
  5. Step 5: Solve for x
    x = 4,086,091.60/2,158.90
  6. Step 6: Final answer
    x = 1,892.67

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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.