Home / 978.84-1,349.37-698.58

Finding the Fourth Proportional to 978.84, 1,349.37 and 698.58

Calculator

Solution

The fourth proportional to 978.84, 1,349.37 and 698.58 is: 963.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.84 : 1,349.37 = 698.58 : x
  2. Step 2: Convert to fraction form
    978.84/1,349.37 = 698.58/x
  3. Step 3: Cross multiply
    978.84x = 1,349.37 × 698.58
  4. Step 4: Simplify right side
    978.84x = 942,642.89
  5. Step 5: Solve for x
    x = 942,642.89/978.84
  6. Step 6: Final answer
    x = 963.02

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.