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Finding the Fourth Proportional to 2,012.90, 3,018.94 and 551.86

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Solution

The fourth proportional to 2,012.90, 3,018.94 and 551.86 is: 827.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.90 : 3,018.94 = 551.86 : x
  2. Step 2: Convert to fraction form
    2,012.90/3,018.94 = 551.86/x
  3. Step 3: Cross multiply
    2,012.90x = 3,018.94 × 551.86
  4. Step 4: Simplify right side
    2,012.90x = 1,666,023.30
  5. Step 5: Solve for x
    x = 1,666,023.30/2,012.90
  6. Step 6: Final answer
    x = 827.68

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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.