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Finding the Fourth Proportional to 2,071.90, 3,107.85 and 773.50

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Solution

The fourth proportional to 2,071.90, 3,107.85 and 773.50 is: 1,160.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.90 : 3,107.85 = 773.50 : x
  2. Step 2: Convert to fraction form
    2,071.90/3,107.85 = 773.50/x
  3. Step 3: Cross multiply
    2,071.90x = 3,107.85 × 773.50
  4. Step 4: Simplify right side
    2,071.90x = 2,403,921.98
  5. Step 5: Solve for x
    x = 2,403,921.98/2,071.90
  6. Step 6: Final answer
    x = 1,160.25

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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.