Home / 1,247.50-2,980

Finding the Third Proportional to 1,247.50 and 2,980

Calculator

Solution

The third proportional to 1,247.50 and 2,980 is: 7,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.50 : 2,980 = 2,980 : x
  2. Step 2: Convert to fraction form
    1,247.50/2,980 = 2,980/x
  3. Step 3: Cross multiply
    1,247.50x = 2,980 × 2,980
  4. Step 4: Simplify right side
    1,247.50x = 8,880,400
  5. Step 5: Solve for x
    x = 8,880,400/1,247.50
  6. Step 6: Final answer
    x = 7,118.56

Related Problems

Find third proportional to 623.75 and 1,490
Half scale
Find third proportional to 2,495 and 5,960
Double scale
Find third proportional to 1,250 and 2,985
Similar ratio
Find third proportional to 1,871.25 and 4,470
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.