Home / 1,977.90-2,728.44-1,605.30

Finding the Fourth Proportional to 1,977.90, 2,728.44 and 1,605.30

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Solution

The fourth proportional to 1,977.90, 2,728.44 and 1,605.30 is: 2,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.90 : 2,728.44 = 1,605.30 : x
  2. Step 2: Convert to fraction form
    1,977.90/2,728.44 = 1,605.30/x
  3. Step 3: Cross multiply
    1,977.90x = 2,728.44 × 1,605.30
  4. Step 4: Simplify right side
    1,977.90x = 4,379,964.73
  5. Step 5: Solve for x
    x = 4,379,964.73/1,977.90
  6. Step 6: Final answer
    x = 2,214.45

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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.