Home / 3,128.66-4,318.06-1,802.12

Finding the Fourth Proportional to 3,128.66, 4,318.06 and 1,802.12

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Solution

The fourth proportional to 3,128.66, 4,318.06 and 1,802.12 is: 2,487.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.66 : 4,318.06 = 1,802.12 : x
  2. Step 2: Convert to fraction form
    3,128.66/4,318.06 = 1,802.12/x
  3. Step 3: Cross multiply
    3,128.66x = 4,318.06 × 1,802.12
  4. Step 4: Simplify right side
    3,128.66x = 7,781,662.29
  5. Step 5: Solve for x
    x = 7,781,662.29/3,128.66
  6. Step 6: Final answer
    x = 2,487.22

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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.