Home / 128,488-272,528

Finding the Third Proportional to 128,488 and 272,528

Calculator

Solution

The third proportional to 128,488 and 272,528 is: 578,042.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,488 : 272,528 = 272,528 : x
  2. Step 2: Convert to fraction form
    128,488/272,528 = 272,528/x
  3. Step 3: Cross multiply
    128,488x = 272,528 × 272,528
  4. Step 4: Simplify right side
    128,488x = 74,271,510,784
  5. Step 5: Solve for x
    x = 74,271,510,784/128,488
  6. Step 6: Final answer
    x = 578,042.39

Related Problems

Find third proportional to 64,244 and 136,264
Half scale
Find third proportional to 256,976 and 545,056
Double scale
Find third proportional to 128,490 and 272,532
Similar ratio
Find third proportional to 192,732 and 408,792
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.