Home / 1,398.10-2,095.46-781.16

Finding the Fourth Proportional to 1,398.10, 2,095.46 and 781.16

Calculator

Solution

The fourth proportional to 1,398.10, 2,095.46 and 781.16 is: 1,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.10 : 2,095.46 = 781.16 : x
  2. Step 2: Convert to fraction form
    1,398.10/2,095.46 = 781.16/x
  3. Step 3: Cross multiply
    1,398.10x = 2,095.46 × 781.16
  4. Step 4: Simplify right side
    1,398.10x = 1,636,889.53
  5. Step 5: Solve for x
    x = 1,636,889.53/1,398.10
  6. Step 6: Final answer
    x = 1,170.80

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.