Home / 1,318.62-1,977.95-394.19

Finding the Fourth Proportional to 1,318.62, 1,977.95 and 394.19

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Solution

The fourth proportional to 1,318.62, 1,977.95 and 394.19 is: 591.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.62 : 1,977.95 = 394.19 : x
  2. Step 2: Convert to fraction form
    1,318.62/1,977.95 = 394.19/x
  3. Step 3: Cross multiply
    1,318.62x = 1,977.95 × 394.19
  4. Step 4: Simplify right side
    1,318.62x = 779,688.11
  5. Step 5: Solve for x
    x = 779,688.11/1,318.62
  6. Step 6: Final answer
    x = 591.29

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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.