Home / 1,912.98-2,641.50-1,440.06

Finding the Fourth Proportional to 1,912.98, 2,641.50 and 1,440.06

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Solution

The fourth proportional to 1,912.98, 2,641.50 and 1,440.06 is: 1,988.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.98 : 2,641.50 = 1,440.06 : x
  2. Step 2: Convert to fraction form
    1,912.98/2,641.50 = 1,440.06/x
  3. Step 3: Cross multiply
    1,912.98x = 2,641.50 × 1,440.06
  4. Step 4: Simplify right side
    1,912.98x = 3,803,918.49
  5. Step 5: Solve for x
    x = 3,803,918.49/1,912.98
  6. Step 6: Final answer
    x = 1,988.48

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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.