Home / 2,129.28-2,937.65-1,197.78

Finding the Fourth Proportional to 2,129.28, 2,937.65 and 1,197.78

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Solution

The fourth proportional to 2,129.28, 2,937.65 and 1,197.78 is: 1,652.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.28 : 2,937.65 = 1,197.78 : x
  2. Step 2: Convert to fraction form
    2,129.28/2,937.65 = 1,197.78/x
  3. Step 3: Cross multiply
    2,129.28x = 2,937.65 × 1,197.78
  4. Step 4: Simplify right side
    2,129.28x = 3,518,652.43
  5. Step 5: Solve for x
    x = 3,518,652.43/2,129.28
  6. Step 6: Final answer
    x = 1,652.51

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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.