Home / 390,498-530,448

Finding the Third Proportional to 390,498 and 530,448

Calculator

Solution

The third proportional to 390,498 and 530,448 is: 720,554.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,498 : 530,448 = 530,448 : x
  2. Step 2: Convert to fraction form
    390,498/530,448 = 530,448/x
  3. Step 3: Cross multiply
    390,498x = 530,448 × 530,448
  4. Step 4: Simplify right side
    390,498x = 281,375,080,704
  5. Step 5: Solve for x
    x = 281,375,080,704/390,498
  6. Step 6: Final answer
    x = 720,554.47

Related Problems

Find third proportional to 195,249 and 265,224
Half scale
Find third proportional to 780,996 and 1,060,896
Double scale
Find third proportional to 390,500 and 530,451
Similar ratio
Find third proportional to 585,747 and 795,672
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.