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Finding the Fourth Proportional to 612.03, 844.38 and 391.08

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Solution

The fourth proportional to 612.03, 844.38 and 391.08 is: 539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.03 : 844.38 = 391.08 : x
  2. Step 2: Convert to fraction form
    612.03/844.38 = 391.08/x
  3. Step 3: Cross multiply
    612.03x = 844.38 × 391.08
  4. Step 4: Simplify right side
    612.03x = 330,220.13
  5. Step 5: Solve for x
    x = 330,220.13/612.03
  6. Step 6: Final answer
    x = 539.55

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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.