Home / 428.73-590.75-290.49

Finding the Fourth Proportional to 428.73, 590.75 and 290.49

Calculator

Solution

The fourth proportional to 428.73, 590.75 and 290.49 is: 400.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.73 : 590.75 = 290.49 : x
  2. Step 2: Convert to fraction form
    428.73/590.75 = 290.49/x
  3. Step 3: Cross multiply
    428.73x = 590.75 × 290.49
  4. Step 4: Simplify right side
    428.73x = 171,605.52
  5. Step 5: Solve for x
    x = 171,605.52/428.73
  6. Step 6: Final answer
    x = 400.26

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.