Home / 678,488-921,454

Finding the Third Proportional to 678,488 and 921,454

Calculator

Solution

The third proportional to 678,488 and 921,454 is: 1,251,425.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,488 : 921,454 = 921,454 : x
  2. Step 2: Convert to fraction form
    678,488/921,454 = 921,454/x
  3. Step 3: Cross multiply
    678,488x = 921,454 × 921,454
  4. Step 4: Simplify right side
    678,488x = 849,077,474,116
  5. Step 5: Solve for x
    x = 849,077,474,116/678,488
  6. Step 6: Final answer
    x = 1,251,425.93

Related Problems

Find third proportional to 339,244 and 460,727
Half scale
Find third proportional to 1,356,976 and 1,842,908
Double scale
Find third proportional to 678,490 and 921,457
Similar ratio
Find third proportional to 1,017,732 and 1,382,181
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.