Home / 690.16-1,034.60-257.20

Finding the Fourth Proportional to 690.16, 1,034.60 and 257.20

Calculator

Solution

The fourth proportional to 690.16, 1,034.60 and 257.20 is: 385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.16 : 1,034.60 = 257.20 : x
  2. Step 2: Convert to fraction form
    690.16/1,034.60 = 257.20/x
  3. Step 3: Cross multiply
    690.16x = 1,034.60 × 257.20
  4. Step 4: Simplify right side
    690.16x = 266,099.12
  5. Step 5: Solve for x
    x = 266,099.12/690.16
  6. Step 6: Final answer
    x = 385.56

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.