Home / 3,128.06-4,317.68-1,802.64

Finding the Fourth Proportional to 3,128.06, 4,317.68 and 1,802.64

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Solution

The fourth proportional to 3,128.06, 4,317.68 and 1,802.64 is: 2,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.06 : 4,317.68 = 1,802.64 : x
  2. Step 2: Convert to fraction form
    3,128.06/4,317.68 = 1,802.64/x
  3. Step 3: Cross multiply
    3,128.06x = 4,317.68 × 1,802.64
  4. Step 4: Simplify right side
    3,128.06x = 7,783,213.66
  5. Step 5: Solve for x
    x = 7,783,213.66/3,128.06
  6. Step 6: Final answer
    x = 2,488.20

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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.