Home / 3,128.13-4,690.60-1,047.38

Finding the Fourth Proportional to 3,128.13, 4,690.60 and 1,047.38

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Solution

The fourth proportional to 3,128.13, 4,690.60 and 1,047.38 is: 1,570.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.13 : 4,690.60 = 1,047.38 : x
  2. Step 2: Convert to fraction form
    3,128.13/4,690.60 = 1,047.38/x
  3. Step 3: Cross multiply
    3,128.13x = 4,690.60 × 1,047.38
  4. Step 4: Simplify right side
    3,128.13x = 4,912,835.39
  5. Step 5: Solve for x
    x = 4,912,835.39/3,128.13
  6. Step 6: Final answer
    x = 1,570.54

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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.