Home / 257,982-390,868

Finding the Third Proportional to 257,982 and 390,868

Calculator

Solution

The third proportional to 257,982 and 390,868 is: 592,203.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,982 : 390,868 = 390,868 : x
  2. Step 2: Convert to fraction form
    257,982/390,868 = 390,868/x
  3. Step 3: Cross multiply
    257,982x = 390,868 × 390,868
  4. Step 4: Simplify right side
    257,982x = 152,777,793,424
  5. Step 5: Solve for x
    x = 152,777,793,424/257,982
  6. Step 6: Final answer
    x = 592,203.31

Related Problems

Find third proportional to 128,991 and 195,434
Half scale
Find third proportional to 515,964 and 781,736
Double scale
Find third proportional to 257,984 and 390,871
Similar ratio
Find third proportional to 386,973 and 586,302
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.