Home / 417,018-690,228

Finding the Third Proportional to 417,018 and 690,228

Calculator

Solution

The third proportional to 417,018 and 690,228 is: 1,142,431.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,018 : 690,228 = 690,228 : x
  2. Step 2: Convert to fraction form
    417,018/690,228 = 690,228/x
  3. Step 3: Cross multiply
    417,018x = 690,228 × 690,228
  4. Step 4: Simplify right side
    417,018x = 476,414,691,984
  5. Step 5: Solve for x
    x = 476,414,691,984/417,018
  6. Step 6: Final answer
    x = 1,142,431.96

Related Problems

Find third proportional to 208,509 and 345,114
Half scale
Find third proportional to 834,036 and 1,380,456
Double scale
Find third proportional to 417,020 and 690,231
Similar ratio
Find third proportional to 625,527 and 1,035,342
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.