Home / 1,311.16-1,979.26-1,303.88

Finding the Fourth Proportional to 1,311.16, 1,979.26 and 1,303.88

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Solution

The fourth proportional to 1,311.16, 1,979.26 and 1,303.88 is: 1,968.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.16 : 1,979.26 = 1,303.88 : x
  2. Step 2: Convert to fraction form
    1,311.16/1,979.26 = 1,303.88/x
  3. Step 3: Cross multiply
    1,311.16x = 1,979.26 × 1,303.88
  4. Step 4: Simplify right side
    1,311.16x = 2,580,717.53
  5. Step 5: Solve for x
    x = 2,580,717.53/1,311.16
  6. Step 6: Final answer
    x = 1,968.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.