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Finding the Fourth Proportional to 2,679.70, 4,019.26 and 705.53

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Solution

The fourth proportional to 2,679.70, 4,019.26 and 705.53 is: 1,058.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.70 : 4,019.26 = 705.53 : x
  2. Step 2: Convert to fraction form
    2,679.70/4,019.26 = 705.53/x
  3. Step 3: Cross multiply
    2,679.70x = 4,019.26 × 705.53
  4. Step 4: Simplify right side
    2,679.70x = 2,835,684.88
  5. Step 5: Solve for x
    x = 2,835,684.88/2,679.70
  6. Step 6: Final answer
    x = 1,058.21

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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.