Home / 915.44-1,373.16-428.15

Finding the Fourth Proportional to 915.44, 1,373.16 and 428.15

Calculator

Solution

The fourth proportional to 915.44, 1,373.16 and 428.15 is: 642.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.44 : 1,373.16 = 428.15 : x
  2. Step 2: Convert to fraction form
    915.44/1,373.16 = 428.15/x
  3. Step 3: Cross multiply
    915.44x = 1,373.16 × 428.15
  4. Step 4: Simplify right side
    915.44x = 587,918.45
  5. Step 5: Solve for x
    x = 587,918.45/915.44
  6. Step 6: Final answer
    x = 642.23

Related Problems

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.