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Finding the Fourth Proportional to 573.50, 860.42 and 330.20

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Solution

The fourth proportional to 573.50, 860.42 and 330.20 is: 495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.50 : 860.42 = 330.20 : x
  2. Step 2: Convert to fraction form
    573.50/860.42 = 330.20/x
  3. Step 3: Cross multiply
    573.50x = 860.42 × 330.20
  4. Step 4: Simplify right side
    573.50x = 284,110.68
  5. Step 5: Solve for x
    x = 284,110.68/573.50
  6. Step 6: Final answer
    x = 495.40

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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.