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Finding the Fourth Proportional to 5,760, 8,647.26 and 4,899.78

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Solution

The fourth proportional to 5,760, 8,647.26 and 4,899.78 is: 7,355.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,760 : 8,647.26 = 4,899.78 : x
  2. Step 2: Convert to fraction form
    5,760/8,647.26 = 4,899.78/x
  3. Step 3: Cross multiply
    5,760x = 8,647.26 × 4,899.78
  4. Step 4: Simplify right side
    5,760x = 42,369,671.60
  5. Step 5: Solve for x
    x = 42,369,671.60/5,760
  6. Step 6: Final answer
    x = 7,355.85

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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.