Home / 952.64-1,428.36-405.20

Finding the Fourth Proportional to 952.64, 1,428.36 and 405.20

Calculator

Solution

The fourth proportional to 952.64, 1,428.36 and 405.20 is: 607.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.64 : 1,428.36 = 405.20 : x
  2. Step 2: Convert to fraction form
    952.64/1,428.36 = 405.20/x
  3. Step 3: Cross multiply
    952.64x = 1,428.36 × 405.20
  4. Step 4: Simplify right side
    952.64x = 578,771.47
  5. Step 5: Solve for x
    x = 578,771.47/952.64
  6. Step 6: Final answer
    x = 607.54

Related Problems

Find fourth proportional to 476.32, 714.18 and 202.60
Half scale
Find fourth proportional to 1,905.28, 2,856.72 and 810.40
Double scale
Find fourth proportional to 953.64, 1,429.86 and 406.20
Similar ratio
Find fourth proportional to 1,428.96, 2,142.54 and 607.80
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.