Home / 1,316.93-1,977.22-668.12

Finding the Fourth Proportional to 1,316.93, 1,977.22 and 668.12

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Solution

The fourth proportional to 1,316.93, 1,977.22 and 668.12 is: 1,003.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.93 : 1,977.22 = 668.12 : x
  2. Step 2: Convert to fraction form
    1,316.93/1,977.22 = 668.12/x
  3. Step 3: Cross multiply
    1,316.93x = 1,977.22 × 668.12
  4. Step 4: Simplify right side
    1,316.93x = 1,321,020.23
  5. Step 5: Solve for x
    x = 1,321,020.23/1,316.93
  6. Step 6: Final answer
    x = 1,003.11

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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.