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Finding the Fourth Proportional to 888.43, 1,331.48 and 394.67

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Solution

The fourth proportional to 888.43, 1,331.48 and 394.67 is: 591.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.43 : 1,331.48 = 394.67 : x
  2. Step 2: Convert to fraction form
    888.43/1,331.48 = 394.67/x
  3. Step 3: Cross multiply
    888.43x = 1,331.48 × 394.67
  4. Step 4: Simplify right side
    888.43x = 525,495.21
  5. Step 5: Solve for x
    x = 525,495.21/888.43
  6. Step 6: Final answer
    x = 591.49

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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.