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Finding the Fourth Proportional to 551.55, 828.27 and 489.99

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Solution

The fourth proportional to 551.55, 828.27 and 489.99 is: 735.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.55 : 828.27 = 489.99 : x
  2. Step 2: Convert to fraction form
    551.55/828.27 = 489.99/x
  3. Step 3: Cross multiply
    551.55x = 828.27 × 489.99
  4. Step 4: Simplify right side
    551.55x = 405,844.02
  5. Step 5: Solve for x
    x = 405,844.02/551.55
  6. Step 6: Final answer
    x = 735.82

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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.