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Finding the Fourth Proportional to 619.43, 854.42 and 383.45

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Solution

The fourth proportional to 619.43, 854.42 and 383.45 is: 528.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.43 : 854.42 = 383.45 : x
  2. Step 2: Convert to fraction form
    619.43/854.42 = 383.45/x
  3. Step 3: Cross multiply
    619.43x = 854.42 × 383.45
  4. Step 4: Simplify right side
    619.43x = 327,623.08
  5. Step 5: Solve for x
    x = 327,623.08/619.43
  6. Step 6: Final answer
    x = 528.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.