Home / 421,020-803,240

Finding the Third Proportional to 421,020 and 803,240

Calculator

Solution

The third proportional to 421,020 and 803,240 is: 1,532,455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,020 : 803,240 = 803,240 : x
  2. Step 2: Convert to fraction form
    421,020/803,240 = 803,240/x
  3. Step 3: Cross multiply
    421,020x = 803,240 × 803,240
  4. Step 4: Simplify right side
    421,020x = 645,194,497,600
  5. Step 5: Solve for x
    x = 645,194,497,600/421,020
  6. Step 6: Final answer
    x = 1,532,455.70

Related Problems

Find third proportional to 210,510 and 401,620
Half scale
Find third proportional to 842,040 and 1,606,480
Double scale
Find third proportional to 421,022 and 803,244
Similar ratio
Find third proportional to 631,530 and 1,204,860
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.