Home / 865-1,237.50

Finding the Third Proportional to 865 and 1,237.50

Calculator

Solution

The third proportional to 865 and 1,237.50 is: 1,770.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    865 : 1,237.50 = 1,237.50 : x
  2. Step 2: Convert to fraction form
    865/1,237.50 = 1,237.50/x
  3. Step 3: Cross multiply
    865x = 1,237.50 × 1,237.50
  4. Step 4: Simplify right side
    865x = 1,531,406.25
  5. Step 5: Solve for x
    x = 1,531,406.25/865
  6. Step 6: Final answer
    x = 1,770.41

Related Problems

Find third proportional to 432.50 and 618.75
Half scale
Find third proportional to 1,730 and 2,475
Double scale
Find third proportional to 867 and 1,240
Similar ratio
Find third proportional to 1,297.50 and 1,856.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.