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Finding the Fourth Proportional to 2,907.74, 4,361.30 and 1,721.90

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Solution

The fourth proportional to 2,907.74, 4,361.30 and 1,721.90 is: 2,582.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.74 : 4,361.30 = 1,721.90 : x
  2. Step 2: Convert to fraction form
    2,907.74/4,361.30 = 1,721.90/x
  3. Step 3: Cross multiply
    2,907.74x = 4,361.30 × 1,721.90
  4. Step 4: Simplify right side
    2,907.74x = 7,509,692.05
  5. Step 5: Solve for x
    x = 7,509,692.05/2,907.74
  6. Step 6: Final answer
    x = 2,582.66

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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.