Home / 1,318.46-1,977.68-394.00

Finding the Fourth Proportional to 1,318.46, 1,977.68 and 394.00

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Solution

The fourth proportional to 1,318.46, 1,977.68 and 394.00 is: 591.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.46 : 1,977.68 = 394.00 : x
  2. Step 2: Convert to fraction form
    1,318.46/1,977.68 = 394.00/x
  3. Step 3: Cross multiply
    1,318.46x = 1,977.68 × 394.00
  4. Step 4: Simplify right side
    1,318.46x = 779,208.64
  5. Step 5: Solve for x
    x = 779,208.64/1,318.46
  6. Step 6: Final answer
    x = 591.00

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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.