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Finding the Fourth Proportional to 3,605.85, 5,408.78 and 1,008.86

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Solution

The fourth proportional to 3,605.85, 5,408.78 and 1,008.86 is: 1,513.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.85 : 5,408.78 = 1,008.86 : x
  2. Step 2: Convert to fraction form
    3,605.85/5,408.78 = 1,008.86/x
  3. Step 3: Cross multiply
    3,605.85x = 5,408.78 × 1,008.86
  4. Step 4: Simplify right side
    3,605.85x = 5,456,669.70
  5. Step 5: Solve for x
    x = 5,456,669.70/3,605.85
  6. Step 6: Final answer
    x = 1,513.28

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1.5x scale

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.