Home / 278.89-384.90-154.54

Finding the Fourth Proportional to 278.89, 384.90 and 154.54

Calculator

Solution

The fourth proportional to 278.89, 384.90 and 154.54 is: 213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.89 : 384.90 = 154.54 : x
  2. Step 2: Convert to fraction form
    278.89/384.90 = 154.54/x
  3. Step 3: Cross multiply
    278.89x = 384.90 × 154.54
  4. Step 4: Simplify right side
    278.89x = 59,482.45
  5. Step 5: Solve for x
    x = 59,482.45/278.89
  6. Step 6: Final answer
    x = 213.28

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.