Home / 901.35-1,350-490.07

Finding the Fourth Proportional to 901.35, 1,350 and 490.07

Calculator

Solution

The fourth proportional to 901.35, 1,350 and 490.07 is: 734.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.35 : 1,350 = 490.07 : x
  2. Step 2: Convert to fraction form
    901.35/1,350 = 490.07/x
  3. Step 3: Cross multiply
    901.35x = 1,350 × 490.07
  4. Step 4: Simplify right side
    901.35x = 661,597.88
  5. Step 5: Solve for x
    x = 661,597.88/901.35
  6. Step 6: Final answer
    x = 734.01

Related Problems

Find fourth proportional to 450.68, 675 and 245.04
Half scale
Find fourth proportional to 1,802.70, 2,700 and 980.15
Double scale
Find fourth proportional to 902.35, 1,351.50 and 491.07
Similar ratio
Find fourth proportional to 1,352.03, 2,025 and 735.11
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.