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Finding the Fourth Proportional to 2,129, 2,938.16 and 1,197.56

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Solution

The fourth proportional to 2,129, 2,938.16 and 1,197.56 is: 1,652.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129 : 2,938.16 = 1,197.56 : x
  2. Step 2: Convert to fraction form
    2,129/2,938.16 = 1,197.56/x
  3. Step 3: Cross multiply
    2,129x = 2,938.16 × 1,197.56
  4. Step 4: Simplify right side
    2,129x = 3,518,622.89
  5. Step 5: Solve for x
    x = 3,518,622.89/2,129
  6. Step 6: Final answer
    x = 1,652.71

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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.