Home / 217,490-306,276

Finding the Third Proportional to 217,490 and 306,276

Calculator

Solution

The third proportional to 217,490 and 306,276 is: 431,307.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,490 : 306,276 = 306,276 : x
  2. Step 2: Convert to fraction form
    217,490/306,276 = 306,276/x
  3. Step 3: Cross multiply
    217,490x = 306,276 × 306,276
  4. Step 4: Simplify right side
    217,490x = 93,804,988,176
  5. Step 5: Solve for x
    x = 93,804,988,176/217,490
  6. Step 6: Final answer
    x = 431,307.13

Related Problems

Find third proportional to 108,745 and 153,138
Half scale
Find third proportional to 434,980 and 612,552
Double scale
Find third proportional to 217,492 and 306,279
Similar ratio
Find third proportional to 326,235 and 459,414
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.