Home / 2,779.77-3,840.08-2,219.50

Finding the Fourth Proportional to 2,779.77, 3,840.08 and 2,219.50

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Solution

The fourth proportional to 2,779.77, 3,840.08 and 2,219.50 is: 3,066.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.77 : 3,840.08 = 2,219.50 : x
  2. Step 2: Convert to fraction form
    2,779.77/3,840.08 = 2,219.50/x
  3. Step 3: Cross multiply
    2,779.77x = 3,840.08 × 2,219.50
  4. Step 4: Simplify right side
    2,779.77x = 8,523,069.99
  5. Step 5: Solve for x
    x = 8,523,069.99/2,779.77
  6. Step 6: Final answer
    x = 3,066.11

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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.