Home / 467-644.16-309.40

Finding the Fourth Proportional to 467, 644.16 and 309.40

Calculator

Solution

The fourth proportional to 467, 644.16 and 309.40 is: 426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    467 : 644.16 = 309.40 : x
  2. Step 2: Convert to fraction form
    467/644.16 = 309.40/x
  3. Step 3: Cross multiply
    467x = 644.16 × 309.40
  4. Step 4: Simplify right side
    467x = 199,303.10
  5. Step 5: Solve for x
    x = 199,303.10/467
  6. Step 6: Final answer
    x = 426.77

Related Problems

Find fourth proportional to 233.50, 322.08 and 154.70
Half scale
Find fourth proportional to 934, 1,288.32 and 618.80
Double scale
Find fourth proportional to 468, 645.54 and 310.40
Similar ratio
Find fourth proportional to 700.50, 966.24 and 464.10
1.5x scale

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.