Home / 952.08-1,313.80-642

Finding the Fourth Proportional to 952.08, 1,313.80 and 642

Calculator

Solution

The fourth proportional to 952.08, 1,313.80 and 642 is: 885.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.08 : 1,313.80 = 642 : x
  2. Step 2: Convert to fraction form
    952.08/1,313.80 = 642/x
  3. Step 3: Cross multiply
    952.08x = 1,313.80 × 642
  4. Step 4: Simplify right side
    952.08x = 843,459.60
  5. Step 5: Solve for x
    x = 843,459.60/952.08
  6. Step 6: Final answer
    x = 885.91

Related Problems

Find fourth proportional to 476.04, 656.90 and 321
Half scale
Find fourth proportional to 1,904.16, 2,627.60 and 1,284
Double scale
Find fourth proportional to 953.08, 1,315.18 and 643
Similar ratio
Find fourth proportional to 1,428.12, 1,970.70 and 963
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.