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Finding the Fourth Proportional to 2,111.70, 3,167.55 and 2,075.70

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Solution

The fourth proportional to 2,111.70, 3,167.55 and 2,075.70 is: 3,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.70 : 3,167.55 = 2,075.70 : x
  2. Step 2: Convert to fraction form
    2,111.70/3,167.55 = 2,075.70/x
  3. Step 3: Cross multiply
    2,111.70x = 3,167.55 × 2,075.70
  4. Step 4: Simplify right side
    2,111.70x = 6,574,883.54
  5. Step 5: Solve for x
    x = 6,574,883.54/2,111.70
  6. Step 6: Final answer
    x = 3,113.55

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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.