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Finding the Fourth Proportional to 601.04, 828.80 and 489.20

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Solution

The fourth proportional to 601.04, 828.80 and 489.20 is: 674.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.04 : 828.80 = 489.20 : x
  2. Step 2: Convert to fraction form
    601.04/828.80 = 489.20/x
  3. Step 3: Cross multiply
    601.04x = 828.80 × 489.20
  4. Step 4: Simplify right side
    601.04x = 405,448.96
  5. Step 5: Solve for x
    x = 405,448.96/601.04
  6. Step 6: Final answer
    x = 674.58

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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.