Home / 1,971.40-2,721.10-1,382.08

Finding the Fourth Proportional to 1,971.40, 2,721.10 and 1,382.08

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Solution

The fourth proportional to 1,971.40, 2,721.10 and 1,382.08 is: 1,907.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.40 : 2,721.10 = 1,382.08 : x
  2. Step 2: Convert to fraction form
    1,971.40/2,721.10 = 1,382.08/x
  3. Step 3: Cross multiply
    1,971.40x = 2,721.10 × 1,382.08
  4. Step 4: Simplify right side
    1,971.40x = 3,760,777.89
  5. Step 5: Solve for x
    x = 3,760,777.89/1,971.40
  6. Step 6: Final answer
    x = 1,907.67

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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.