Home / 215,388-308,312

Finding the Third Proportional to 215,388 and 308,312

Calculator

Solution

The third proportional to 215,388 and 308,312 is: 441,325.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,388 : 308,312 = 308,312 : x
  2. Step 2: Convert to fraction form
    215,388/308,312 = 308,312/x
  3. Step 3: Cross multiply
    215,388x = 308,312 × 308,312
  4. Step 4: Simplify right side
    215,388x = 95,056,289,344
  5. Step 5: Solve for x
    x = 95,056,289,344/215,388
  6. Step 6: Final answer
    x = 441,325.84

Related Problems

Find third proportional to 107,694 and 154,156
Half scale
Find third proportional to 430,776 and 616,624
Double scale
Find third proportional to 215,390 and 308,315
Similar ratio
Find third proportional to 323,082 and 462,468
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.