Home / 2,129.72-3,193.80-1,305.48

Finding the Fourth Proportional to 2,129.72, 3,193.80 and 1,305.48

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Solution

The fourth proportional to 2,129.72, 3,193.80 and 1,305.48 is: 1,957.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.72 : 3,193.80 = 1,305.48 : x
  2. Step 2: Convert to fraction form
    2,129.72/3,193.80 = 1,305.48/x
  3. Step 3: Cross multiply
    2,129.72x = 3,193.80 × 1,305.48
  4. Step 4: Simplify right side
    2,129.72x = 4,169,442.02
  5. Step 5: Solve for x
    x = 4,169,442.02/2,129.72
  6. Step 6: Final answer
    x = 1,957.74

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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.