Home / 1,338.16-2,004.64-986.12

Finding the Fourth Proportional to 1,338.16, 2,004.64 and 986.12

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Solution

The fourth proportional to 1,338.16, 2,004.64 and 986.12 is: 1,477.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.16 : 2,004.64 = 986.12 : x
  2. Step 2: Convert to fraction form
    1,338.16/2,004.64 = 986.12/x
  3. Step 3: Cross multiply
    1,338.16x = 2,004.64 × 986.12
  4. Step 4: Simplify right side
    1,338.16x = 1,976,820.61
  5. Step 5: Solve for x
    x = 1,976,820.61/1,338.16
  6. Step 6: Final answer
    x = 1,477.27

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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.