Home / 921.86-1,272.14-512.57

Finding the Fourth Proportional to 921.86, 1,272.14 and 512.57

Calculator

Solution

The fourth proportional to 921.86, 1,272.14 and 512.57 is: 707.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.86 : 1,272.14 = 512.57 : x
  2. Step 2: Convert to fraction form
    921.86/1,272.14 = 512.57/x
  3. Step 3: Cross multiply
    921.86x = 1,272.14 × 512.57
  4. Step 4: Simplify right side
    921.86x = 652,051.88
  5. Step 5: Solve for x
    x = 652,051.88/921.86
  6. Step 6: Final answer
    x = 707.32

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.