Home / 148-387

Finding the Third Proportional to 148 and 387

Calculator

Solution

The third proportional to 148 and 387 is: 1,011.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    148 : 387 = 387 : x
  2. Step 2: Convert to fraction form
    148/387 = 387/x
  3. Step 3: Cross multiply
    148x = 387 × 387
  4. Step 4: Simplify right side
    148x = 149,769
  5. Step 5: Solve for x
    x = 149,769/148
  6. Step 6: Final answer
    x = 1,011.95

Related Problems

Find third proportional to 74 and 193.50
Half scale
Find third proportional to 296 and 774
Double scale
Find third proportional to 150 and 392
Similar ratio
Find third proportional to 222 and 580.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.