Home / 1,131.12-1,695.30-926.12

Finding the Fourth Proportional to 1,131.12, 1,695.30 and 926.12

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Solution

The fourth proportional to 1,131.12, 1,695.30 and 926.12 is: 1,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.12 : 1,695.30 = 926.12 : x
  2. Step 2: Convert to fraction form
    1,131.12/1,695.30 = 926.12/x
  3. Step 3: Cross multiply
    1,131.12x = 1,695.30 × 926.12
  4. Step 4: Simplify right side
    1,131.12x = 1,570,051.24
  5. Step 5: Solve for x
    x = 1,570,051.24/1,131.12
  6. Step 6: Final answer
    x = 1,388.05

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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.