Home / 638,139-987,979

Finding the Third Proportional to 638,139 and 987,979

Calculator

Solution

The third proportional to 638,139 and 987,979 is: 1,529,607.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,139 : 987,979 = 987,979 : x
  2. Step 2: Convert to fraction form
    638,139/987,979 = 987,979/x
  3. Step 3: Cross multiply
    638,139x = 987,979 × 987,979
  4. Step 4: Simplify right side
    638,139x = 976,102,504,441
  5. Step 5: Solve for x
    x = 976,102,504,441/638,139
  6. Step 6: Final answer
    x = 1,529,607.98

Related Problems

Find third proportional to 319,069.50 and 493,989.50
Half scale
Find third proportional to 1,276,278 and 1,975,958
Double scale
Find third proportional to 638,141 and 987,982
Similar ratio
Find third proportional to 957,208.50 and 1,481,968.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.