Home / 438,426-657,699

Finding the Third Proportional to 438,426 and 657,699

Calculator

Solution

The third proportional to 438,426 and 657,699 is: 986,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,426 : 657,699 = 657,699 : x
  2. Step 2: Convert to fraction form
    438,426/657,699 = 657,699/x
  3. Step 3: Cross multiply
    438,426x = 657,699 × 657,699
  4. Step 4: Simplify right side
    438,426x = 432,567,974,601
  5. Step 5: Solve for x
    x = 432,567,974,601/438,426
  6. Step 6: Final answer
    x = 986,638.51

Related Problems

Find third proportional to 219,213 and 328,849.50
Half scale
Find third proportional to 876,852 and 1,315,398
Double scale
Find third proportional to 438,428 and 657,702
Similar ratio
Find third proportional to 657,639 and 986,548.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.