Home / 309,248-477,840

Finding the Third Proportional to 309,248 and 477,840

Calculator

Solution

The third proportional to 309,248 and 477,840 is: 738,342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,248 : 477,840 = 477,840 : x
  2. Step 2: Convert to fraction form
    309,248/477,840 = 477,840/x
  3. Step 3: Cross multiply
    309,248x = 477,840 × 477,840
  4. Step 4: Simplify right side
    309,248x = 228,331,065,600
  5. Step 5: Solve for x
    x = 228,331,065,600/309,248
  6. Step 6: Final answer
    x = 738,342.90

Related Problems

Find third proportional to 154,624 and 238,920
Half scale
Find third proportional to 618,496 and 955,680
Double scale
Find third proportional to 309,250 and 477,843
Similar ratio
Find third proportional to 463,872 and 716,760
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.