Home / 666.50-987

Finding the Third Proportional to 666.50 and 987

Calculator

Solution

The third proportional to 666.50 and 987 is: 1,461.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.50 : 987 = 987 : x
  2. Step 2: Convert to fraction form
    666.50/987 = 987/x
  3. Step 3: Cross multiply
    666.50x = 987 × 987
  4. Step 4: Simplify right side
    666.50x = 974,169
  5. Step 5: Solve for x
    x = 974,169/666.50
  6. Step 6: Final answer
    x = 1,461.62

Related Problems

Find third proportional to 333.25 and 493.50
Half scale
Find third proportional to 1,333 and 1,974
Double scale
Find third proportional to 669 and 990
Similar ratio
Find third proportional to 999.75 and 1,480.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.