Home / 3,128.80-4,317.69-1,802.50

Finding the Fourth Proportional to 3,128.80, 4,317.69 and 1,802.50

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Solution

The fourth proportional to 3,128.80, 4,317.69 and 1,802.50 is: 2,487.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.80 : 4,317.69 = 1,802.50 : x
  2. Step 2: Convert to fraction form
    3,128.80/4,317.69 = 1,802.50/x
  3. Step 3: Cross multiply
    3,128.80x = 4,317.69 × 1,802.50
  4. Step 4: Simplify right side
    3,128.80x = 7,782,636.23
  5. Step 5: Solve for x
    x = 7,782,636.23/3,128.80
  6. Step 6: Final answer
    x = 2,487.42

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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.