Home / 2,129.40-2,938.50-1,197.72

Finding the Fourth Proportional to 2,129.40, 2,938.50 and 1,197.72

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Solution

The fourth proportional to 2,129.40, 2,938.50 and 1,197.72 is: 1,652.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.40 : 2,938.50 = 1,197.72 : x
  2. Step 2: Convert to fraction form
    2,129.40/2,938.50 = 1,197.72/x
  3. Step 3: Cross multiply
    2,129.40x = 2,938.50 × 1,197.72
  4. Step 4: Simplify right side
    2,129.40x = 3,519,500.22
  5. Step 5: Solve for x
    x = 3,519,500.22/2,129.40
  6. Step 6: Final answer
    x = 1,652.81

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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.