Home / 1,318.37-1,977.74-393.99

Finding the Fourth Proportional to 1,318.37, 1,977.74 and 393.99

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Solution

The fourth proportional to 1,318.37, 1,977.74 and 393.99 is: 591.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.37 : 1,977.74 = 393.99 : x
  2. Step 2: Convert to fraction form
    1,318.37/1,977.74 = 393.99/x
  3. Step 3: Cross multiply
    1,318.37x = 1,977.74 × 393.99
  4. Step 4: Simplify right side
    1,318.37x = 779,207.81
  5. Step 5: Solve for x
    x = 779,207.81/1,318.37
  6. Step 6: Final answer
    x = 591.04

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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.