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Finding the Fourth Proportional to 2,369.21, 3,554.31 and 908.78

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Solution

The fourth proportional to 2,369.21, 3,554.31 and 908.78 is: 1,363.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,369.21 : 3,554.31 = 908.78 : x
  2. Step 2: Convert to fraction form
    2,369.21/3,554.31 = 908.78/x
  3. Step 3: Cross multiply
    2,369.21x = 3,554.31 × 908.78
  4. Step 4: Simplify right side
    2,369.21x = 3,230,068.07
  5. Step 5: Solve for x
    x = 3,230,068.07/2,369.21
  6. Step 6: Final answer
    x = 1,363.36

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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.