Home / 1,102.60-1,521.90-771.11

Finding the Fourth Proportional to 1,102.60, 1,521.90 and 771.11

Calculator

Solution

The fourth proportional to 1,102.60, 1,521.90 and 771.11 is: 1,064.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.60 : 1,521.90 = 771.11 : x
  2. Step 2: Convert to fraction form
    1,102.60/1,521.90 = 771.11/x
  3. Step 3: Cross multiply
    1,102.60x = 1,521.90 × 771.11
  4. Step 4: Simplify right side
    1,102.60x = 1,173,552.31
  5. Step 5: Solve for x
    x = 1,173,552.31/1,102.60
  6. Step 6: Final answer
    x = 1,064.35

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.