Home / 989-1,484-441.56

Finding the Fourth Proportional to 989, 1,484 and 441.56

Calculator

Solution

The fourth proportional to 989, 1,484 and 441.56 is: 662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    989 : 1,484 = 441.56 : x
  2. Step 2: Convert to fraction form
    989/1,484 = 441.56/x
  3. Step 3: Cross multiply
    989x = 1,484 × 441.56
  4. Step 4: Simplify right side
    989x = 655,275.04
  5. Step 5: Solve for x
    x = 655,275.04/989
  6. Step 6: Final answer
    x = 662.56

Related Problems

Find fourth proportional to 494.50, 742 and 220.78
Half scale
Find fourth proportional to 1,978, 2,968 and 883.12
Double scale
Find fourth proportional to 990, 1,485.50 and 442.56
Similar ratio
Find fourth proportional to 1,483.50, 2,226 and 662.34
1.5x scale

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.