Home / 1,921.30-2,651.42-1,135.35

Finding the Fourth Proportional to 1,921.30, 2,651.42 and 1,135.35

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Solution

The fourth proportional to 1,921.30, 2,651.42 and 1,135.35 is: 1,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.30 : 2,651.42 = 1,135.35 : x
  2. Step 2: Convert to fraction form
    1,921.30/2,651.42 = 1,135.35/x
  3. Step 3: Cross multiply
    1,921.30x = 2,651.42 × 1,135.35
  4. Step 4: Simplify right side
    1,921.30x = 3,010,289.70
  5. Step 5: Solve for x
    x = 3,010,289.70/1,921.30
  6. Step 6: Final answer
    x = 1,566.80

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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.