Home / 210.47-315.43-88.65

Finding the Fourth Proportional to 210.47, 315.43 and 88.65

Calculator

Solution

The fourth proportional to 210.47, 315.43 and 88.65 is: 132.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.47 : 315.43 = 88.65 : x
  2. Step 2: Convert to fraction form
    210.47/315.43 = 88.65/x
  3. Step 3: Cross multiply
    210.47x = 315.43 × 88.65
  4. Step 4: Simplify right side
    210.47x = 27,962.65
  5. Step 5: Solve for x
    x = 27,962.65/210.47
  6. Step 6: Final answer
    x = 132.86

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.