Home / 420,312-630,558

Finding the Third Proportional to 420,312 and 630,558

Calculator

Solution

The third proportional to 420,312 and 630,558 is: 945,972.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,312 : 630,558 = 630,558 : x
  2. Step 2: Convert to fraction form
    420,312/630,558 = 630,558/x
  3. Step 3: Cross multiply
    420,312x = 630,558 × 630,558
  4. Step 4: Simplify right side
    420,312x = 397,603,391,364
  5. Step 5: Solve for x
    x = 397,603,391,364/420,312
  6. Step 6: Final answer
    x = 945,972.02

Related Problems

Find third proportional to 210,156 and 315,279
Half scale
Find third proportional to 840,624 and 1,261,116
Double scale
Find third proportional to 420,314 and 630,561
Similar ratio
Find third proportional to 630,468 and 945,837
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.