Home / 1,318.37-1,977.93-393.97

Finding the Fourth Proportional to 1,318.37, 1,977.93 and 393.97

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Solution

The fourth proportional to 1,318.37, 1,977.93 and 393.97 is: 591.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.37 : 1,977.93 = 393.97 : x
  2. Step 2: Convert to fraction form
    1,318.37/1,977.93 = 393.97/x
  3. Step 3: Cross multiply
    1,318.37x = 1,977.93 × 393.97
  4. Step 4: Simplify right side
    1,318.37x = 779,235.19
  5. Step 5: Solve for x
    x = 779,235.19/1,318.37
  6. Step 6: Final answer
    x = 591.06

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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.