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Finding the Fourth Proportional to 3,605.76, 5,408.64 and 1,008.78

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Solution

The fourth proportional to 3,605.76, 5,408.64 and 1,008.78 is: 1,513.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.76 : 5,408.64 = 1,008.78 : x
  2. Step 2: Convert to fraction form
    3,605.76/5,408.64 = 1,008.78/x
  3. Step 3: Cross multiply
    3,605.76x = 5,408.64 × 1,008.78
  4. Step 4: Simplify right side
    3,605.76x = 5,456,127.86
  5. Step 5: Solve for x
    x = 5,456,127.86/3,605.76
  6. Step 6: Final answer
    x = 1,513.17

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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.