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Finding the Fourth Proportional to 743.35, 1,113.89 and 396.74

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Solution

The fourth proportional to 743.35, 1,113.89 and 396.74 is: 594.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.35 : 1,113.89 = 396.74 : x
  2. Step 2: Convert to fraction form
    743.35/1,113.89 = 396.74/x
  3. Step 3: Cross multiply
    743.35x = 1,113.89 × 396.74
  4. Step 4: Simplify right side
    743.35x = 441,919.36
  5. Step 5: Solve for x
    x = 441,919.36/743.35
  6. Step 6: Final answer
    x = 594.50

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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.