Home / 646.70-892.48-398.14

Finding the Fourth Proportional to 646.70, 892.48 and 398.14

Calculator

Solution

The fourth proportional to 646.70, 892.48 and 398.14 is: 549.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.70 : 892.48 = 398.14 : x
  2. Step 2: Convert to fraction form
    646.70/892.48 = 398.14/x
  3. Step 3: Cross multiply
    646.70x = 892.48 × 398.14
  4. Step 4: Simplify right side
    646.70x = 355,328.76
  5. Step 5: Solve for x
    x = 355,328.76/646.70
  6. Step 6: Final answer
    x = 549.45

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.