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Finding the Fourth Proportional to 2,604.84, 3,907.74 and 874.68

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Solution

The fourth proportional to 2,604.84, 3,907.74 and 874.68 is: 1,312.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,604.84 : 3,907.74 = 874.68 : x
  2. Step 2: Convert to fraction form
    2,604.84/3,907.74 = 874.68/x
  3. Step 3: Cross multiply
    2,604.84x = 3,907.74 × 874.68
  4. Step 4: Simplify right side
    2,604.84x = 3,418,022.02
  5. Step 5: Solve for x
    x = 3,418,022.02/2,604.84
  6. Step 6: Final answer
    x = 1,312.18

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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.