Home / 3,128.67-4,318.06-1,802.11

Finding the Fourth Proportional to 3,128.67, 4,318.06 and 1,802.11

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Solution

The fourth proportional to 3,128.67, 4,318.06 and 1,802.11 is: 2,487.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.67 : 4,318.06 = 1,802.11 : x
  2. Step 2: Convert to fraction form
    3,128.67/4,318.06 = 1,802.11/x
  3. Step 3: Cross multiply
    3,128.67x = 4,318.06 × 1,802.11
  4. Step 4: Simplify right side
    3,128.67x = 7,781,619.11
  5. Step 5: Solve for x
    x = 7,781,619.11/3,128.67
  6. Step 6: Final answer
    x = 2,487.20

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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.