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Finding the Fourth Proportional to 489.44, 672.89 and 436.48

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Solution

The fourth proportional to 489.44, 672.89 and 436.48 is: 600.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.44 : 672.89 = 436.48 : x
  2. Step 2: Convert to fraction form
    489.44/672.89 = 436.48/x
  3. Step 3: Cross multiply
    489.44x = 672.89 × 436.48
  4. Step 4: Simplify right side
    489.44x = 293,703.03
  5. Step 5: Solve for x
    x = 293,703.03/489.44
  6. Step 6: Final answer
    x = 600.08

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.