Home / 3,128.72-4,318.11-1,784.33

Finding the Fourth Proportional to 3,128.72, 4,318.11 and 1,784.33

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Solution

The fourth proportional to 3,128.72, 4,318.11 and 1,784.33 is: 2,462.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.72 : 4,318.11 = 1,784.33 : x
  2. Step 2: Convert to fraction form
    3,128.72/4,318.11 = 1,784.33/x
  3. Step 3: Cross multiply
    3,128.72x = 4,318.11 × 1,784.33
  4. Step 4: Simplify right side
    3,128.72x = 7,704,927.82
  5. Step 5: Solve for x
    x = 7,704,927.82/3,128.72
  6. Step 6: Final answer
    x = 2,462.65

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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.