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Finding the Fourth Proportional to 2,939.21, 4,408.75 and 718.05

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Solution

The fourth proportional to 2,939.21, 4,408.75 and 718.05 is: 1,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.21 : 4,408.75 = 718.05 : x
  2. Step 2: Convert to fraction form
    2,939.21/4,408.75 = 718.05/x
  3. Step 3: Cross multiply
    2,939.21x = 4,408.75 × 718.05
  4. Step 4: Simplify right side
    2,939.21x = 3,165,702.94
  5. Step 5: Solve for x
    x = 3,165,702.94/2,939.21
  6. Step 6: Final answer
    x = 1,077.06

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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.