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Finding the Fourth Proportional to 609.42, 839.52 and 484.95

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Solution

The fourth proportional to 609.42, 839.52 and 484.95 is: 668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.42 : 839.52 = 484.95 : x
  2. Step 2: Convert to fraction form
    609.42/839.52 = 484.95/x
  3. Step 3: Cross multiply
    609.42x = 839.52 × 484.95
  4. Step 4: Simplify right side
    609.42x = 407,125.22
  5. Step 5: Solve for x
    x = 407,125.22/609.42
  6. Step 6: Final answer
    x = 668.05

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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.