Home / 1,311.68-1,968.37-1,225.23

Finding the Fourth Proportional to 1,311.68, 1,968.37 and 1,225.23

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Solution

The fourth proportional to 1,311.68, 1,968.37 and 1,225.23 is: 1,838.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.68 : 1,968.37 = 1,225.23 : x
  2. Step 2: Convert to fraction form
    1,311.68/1,968.37 = 1,225.23/x
  3. Step 3: Cross multiply
    1,311.68x = 1,968.37 × 1,225.23
  4. Step 4: Simplify right side
    1,311.68x = 2,411,695.53
  5. Step 5: Solve for x
    x = 2,411,695.53/1,311.68
  6. Step 6: Final answer
    x = 1,838.64

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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.