Home / 2,980.80-4,113.99-1,802.45

Finding the Fourth Proportional to 2,980.80, 4,113.99 and 1,802.45

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Solution

The fourth proportional to 2,980.80, 4,113.99 and 1,802.45 is: 2,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.80 : 4,113.99 = 1,802.45 : x
  2. Step 2: Convert to fraction form
    2,980.80/4,113.99 = 1,802.45/x
  3. Step 3: Cross multiply
    2,980.80x = 4,113.99 × 1,802.45
  4. Step 4: Simplify right side
    2,980.80x = 7,415,271.56
  5. Step 5: Solve for x
    x = 7,415,271.56/2,980.80
  6. Step 6: Final answer
    x = 2,487.68

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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.