Home / 1.23-1.69-0.89

Finding the Fourth Proportional to 1.23, 1.69 and 0.89

Calculator

Solution

The fourth proportional to 1.23, 1.69 and 0.89 is: 1.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.23 : 1.69 = 0.89 : x
  2. Step 2: Convert to fraction form
    1.23/1.69 = 0.89/x
  3. Step 3: Cross multiply
    1.23x = 1.69 × 0.89
  4. Step 4: Simplify right side
    1.23x = 1.50
  5. Step 5: Solve for x
    x = 1.50/1.23
  6. Step 6: Final answer
    x = 1.22

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.