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Finding the Fourth Proportional to 609.03, 912.72 and 392.22

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Solution

The fourth proportional to 609.03, 912.72 and 392.22 is: 587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.03 : 912.72 = 392.22 : x
  2. Step 2: Convert to fraction form
    609.03/912.72 = 392.22/x
  3. Step 3: Cross multiply
    609.03x = 912.72 × 392.22
  4. Step 4: Simplify right side
    609.03x = 357,987.04
  5. Step 5: Solve for x
    x = 357,987.04/609.03
  6. Step 6: Final answer
    x = 587.80

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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.