Home / 2,782.15-4,173.66-1,320.50

Finding the Fourth Proportional to 2,782.15, 4,173.66 and 1,320.50

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Solution

The fourth proportional to 2,782.15, 4,173.66 and 1,320.50 is: 1,980.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.15 : 4,173.66 = 1,320.50 : x
  2. Step 2: Convert to fraction form
    2,782.15/4,173.66 = 1,320.50/x
  3. Step 3: Cross multiply
    2,782.15x = 4,173.66 × 1,320.50
  4. Step 4: Simplify right side
    2,782.15x = 5,511,328.46
  5. Step 5: Solve for x
    x = 5,511,328.46/2,782.15
  6. Step 6: Final answer
    x = 1,980.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.