Home / 1,318.44-1,977.77-393.93

Finding the Fourth Proportional to 1,318.44, 1,977.77 and 393.93

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Solution

The fourth proportional to 1,318.44, 1,977.77 and 393.93 is: 590.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.44 : 1,977.77 = 393.93 : x
  2. Step 2: Convert to fraction form
    1,318.44/1,977.77 = 393.93/x
  3. Step 3: Cross multiply
    1,318.44x = 1,977.77 × 393.93
  4. Step 4: Simplify right side
    1,318.44x = 779,100.97
  5. Step 5: Solve for x
    x = 779,100.97/1,318.44
  6. Step 6: Final answer
    x = 590.93

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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.