Home / 418,308-646,356

Finding the Third Proportional to 418,308 and 646,356

Calculator

Solution

The third proportional to 418,308 and 646,356 is: 998,728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,308 : 646,356 = 646,356 : x
  2. Step 2: Convert to fraction form
    418,308/646,356 = 646,356/x
  3. Step 3: Cross multiply
    418,308x = 646,356 × 646,356
  4. Step 4: Simplify right side
    418,308x = 417,776,078,736
  5. Step 5: Solve for x
    x = 417,776,078,736/418,308
  6. Step 6: Final answer
    x = 998,728.40

Related Problems

Find third proportional to 209,154 and 323,178
Half scale
Find third proportional to 836,616 and 1,292,712
Double scale
Find third proportional to 418,310 and 646,359
Similar ratio
Find third proportional to 627,462 and 969,534
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.