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Finding the Fourth Proportional to 1,777.78, 2,666.84 and 683.06

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Solution

The fourth proportional to 1,777.78, 2,666.84 and 683.06 is: 1,024.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.78 : 2,666.84 = 683.06 : x
  2. Step 2: Convert to fraction form
    1,777.78/2,666.84 = 683.06/x
  3. Step 3: Cross multiply
    1,777.78x = 2,666.84 × 683.06
  4. Step 4: Simplify right side
    1,777.78x = 1,821,611.73
  5. Step 5: Solve for x
    x = 1,821,611.73/1,777.78
  6. Step 6: Final answer
    x = 1,024.66

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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.