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Finding the Fourth Proportional to 1,099.34, 1,648.90 and 551.88

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Solution

The fourth proportional to 1,099.34, 1,648.90 and 551.88 is: 827.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.34 : 1,648.90 = 551.88 : x
  2. Step 2: Convert to fraction form
    1,099.34/1,648.90 = 551.88/x
  3. Step 3: Cross multiply
    1,099.34x = 1,648.90 × 551.88
  4. Step 4: Simplify right side
    1,099.34x = 909,983.93
  5. Step 5: Solve for x
    x = 909,983.93/1,099.34
  6. Step 6: Final answer
    x = 827.76

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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.