Home / 2,790.90-4,185-1,867.50

Finding the Fourth Proportional to 2,790.90, 4,185 and 1,867.50

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Solution

The fourth proportional to 2,790.90, 4,185 and 1,867.50 is: 2,800.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.90 : 4,185 = 1,867.50 : x
  2. Step 2: Convert to fraction form
    2,790.90/4,185 = 1,867.50/x
  3. Step 3: Cross multiply
    2,790.90x = 4,185 × 1,867.50
  4. Step 4: Simplify right side
    2,790.90x = 7,815,487.50
  5. Step 5: Solve for x
    x = 7,815,487.50/2,790.90
  6. Step 6: Final answer
    x = 2,800.35

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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.