Home / 3,139.89-4,702.35-1,749.78

Finding the Fourth Proportional to 3,139.89, 4,702.35 and 1,749.78

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Solution

The fourth proportional to 3,139.89, 4,702.35 and 1,749.78 is: 2,620.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.89 : 4,702.35 = 1,749.78 : x
  2. Step 2: Convert to fraction form
    3,139.89/4,702.35 = 1,749.78/x
  3. Step 3: Cross multiply
    3,139.89x = 4,702.35 × 1,749.78
  4. Step 4: Simplify right side
    3,139.89x = 8,228,077.98
  5. Step 5: Solve for x
    x = 8,228,077.98/3,139.89
  6. Step 6: Final answer
    x = 2,620.50

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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.