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Finding the Fourth Proportional to 2,951.90, 4,071.86 and 1,889.90

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Solution

The fourth proportional to 2,951.90, 4,071.86 and 1,889.90 is: 2,606.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,951.90 : 4,071.86 = 1,889.90 : x
  2. Step 2: Convert to fraction form
    2,951.90/4,071.86 = 1,889.90/x
  3. Step 3: Cross multiply
    2,951.90x = 4,071.86 × 1,889.90
  4. Step 4: Simplify right side
    2,951.90x = 7,695,408.21
  5. Step 5: Solve for x
    x = 7,695,408.21/2,951.90
  6. Step 6: Final answer
    x = 2,606.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.