Home / 390,415-530,326

Finding the Third Proportional to 390,415 and 530,326

Calculator

Solution

The third proportional to 390,415 and 530,326 is: 720,376.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,415 : 530,326 = 530,326 : x
  2. Step 2: Convert to fraction form
    390,415/530,326 = 530,326/x
  3. Step 3: Cross multiply
    390,415x = 530,326 × 530,326
  4. Step 4: Simplify right side
    390,415x = 281,245,666,276
  5. Step 5: Solve for x
    x = 281,245,666,276/390,415
  6. Step 6: Final answer
    x = 720,376.18

Related Problems

Find third proportional to 195,207.50 and 265,163
Half scale
Find third proportional to 780,830 and 1,060,652
Double scale
Find third proportional to 390,417 and 530,329
Similar ratio
Find third proportional to 585,622.50 and 795,489
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.