Home / 1,131.15-1,558.20-983.53

Finding the Fourth Proportional to 1,131.15, 1,558.20 and 983.53

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Solution

The fourth proportional to 1,131.15, 1,558.20 and 983.53 is: 1,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.15 : 1,558.20 = 983.53 : x
  2. Step 2: Convert to fraction form
    1,131.15/1,558.20 = 983.53/x
  3. Step 3: Cross multiply
    1,131.15x = 1,558.20 × 983.53
  4. Step 4: Simplify right side
    1,131.15x = 1,532,542.08
  5. Step 5: Solve for x
    x = 1,532,542.08/1,131.15
  6. Step 6: Final answer
    x = 1,354.85

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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.