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Finding the Fourth Proportional to 1,216.40, 1,824.48 and 394.44

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Solution

The fourth proportional to 1,216.40, 1,824.48 and 394.44 is: 591.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.40 : 1,824.48 = 394.44 : x
  2. Step 2: Convert to fraction form
    1,216.40/1,824.48 = 394.44/x
  3. Step 3: Cross multiply
    1,216.40x = 1,824.48 × 394.44
  4. Step 4: Simplify right side
    1,216.40x = 719,647.89
  5. Step 5: Solve for x
    x = 719,647.89/1,216.40
  6. Step 6: Final answer
    x = 591.62

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1.5x scale

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.