Home / 3,128.80-4,693.64-1,048.12

Finding the Fourth Proportional to 3,128.80, 4,693.64 and 1,048.12

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Solution

The fourth proportional to 3,128.80, 4,693.64 and 1,048.12 is: 1,572.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.80 : 4,693.64 = 1,048.12 : x
  2. Step 2: Convert to fraction form
    3,128.80/4,693.64 = 1,048.12/x
  3. Step 3: Cross multiply
    3,128.80x = 4,693.64 × 1,048.12
  4. Step 4: Simplify right side
    3,128.80x = 4,919,497.96
  5. Step 5: Solve for x
    x = 4,919,497.96/3,128.80
  6. Step 6: Final answer
    x = 1,572.33

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1.5x scale

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.