Home / 178,074-391,138

Finding the Third Proportional to 178,074 and 391,138

Calculator

Solution

The third proportional to 178,074 and 391,138 is: 859,131.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,074 : 391,138 = 391,138 : x
  2. Step 2: Convert to fraction form
    178,074/391,138 = 391,138/x
  3. Step 3: Cross multiply
    178,074x = 391,138 × 391,138
  4. Step 4: Simplify right side
    178,074x = 152,988,935,044
  5. Step 5: Solve for x
    x = 152,988,935,044/178,074
  6. Step 6: Final answer
    x = 859,131.23

Related Problems

Find third proportional to 89,037 and 195,569
Half scale
Find third proportional to 356,148 and 782,276
Double scale
Find third proportional to 178,076 and 391,142
Similar ratio
Find third proportional to 267,111 and 586,707
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.