Home / 420,020-921,688

Finding the Third Proportional to 420,020 and 921,688

Calculator

Solution

The third proportional to 420,020 and 921,688 is: 2,022,543.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,020 : 921,688 = 921,688 : x
  2. Step 2: Convert to fraction form
    420,020/921,688 = 921,688/x
  3. Step 3: Cross multiply
    420,020x = 921,688 × 921,688
  4. Step 4: Simplify right side
    420,020x = 849,508,769,344
  5. Step 5: Solve for x
    x = 849,508,769,344/420,020
  6. Step 6: Final answer
    x = 2,022,543.62

Related Problems

Find third proportional to 210,010 and 460,844
Half scale
Find third proportional to 840,040 and 1,843,376
Double scale
Find third proportional to 420,022 and 921,692
Similar ratio
Find third proportional to 630,030 and 1,382,532
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.