Home / 3,128.79-4,317.38-1,802.48

Finding the Fourth Proportional to 3,128.79, 4,317.38 and 1,802.48

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Solution

The fourth proportional to 3,128.79, 4,317.38 and 1,802.48 is: 2,487.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.79 : 4,317.38 = 1,802.48 : x
  2. Step 2: Convert to fraction form
    3,128.79/4,317.38 = 1,802.48/x
  3. Step 3: Cross multiply
    3,128.79x = 4,317.38 × 1,802.48
  4. Step 4: Simplify right side
    3,128.79x = 7,781,960.50
  5. Step 5: Solve for x
    x = 7,781,960.50/3,128.79
  6. Step 6: Final answer
    x = 2,487.21

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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.