Home / 670.17-1,005.21-280.07

Finding the Fourth Proportional to 670.17, 1,005.21 and 280.07

Calculator

Solution

The fourth proportional to 670.17, 1,005.21 and 280.07 is: 420.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.17 : 1,005.21 = 280.07 : x
  2. Step 2: Convert to fraction form
    670.17/1,005.21 = 280.07/x
  3. Step 3: Cross multiply
    670.17x = 1,005.21 × 280.07
  4. Step 4: Simplify right side
    670.17x = 281,524.14
  5. Step 5: Solve for x
    x = 281,524.14/670.17
  6. Step 6: Final answer
    x = 420.08

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.