Home / 1,262.56-1,740-912.64

Finding the Fourth Proportional to 1,262.56, 1,740 and 912.64

Calculator

Solution

The fourth proportional to 1,262.56, 1,740 and 912.64 is: 1,257.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.56 : 1,740 = 912.64 : x
  2. Step 2: Convert to fraction form
    1,262.56/1,740 = 912.64/x
  3. Step 3: Cross multiply
    1,262.56x = 1,740 × 912.64
  4. Step 4: Simplify right side
    1,262.56x = 1,587,993.60
  5. Step 5: Solve for x
    x = 1,587,993.60/1,262.56
  6. Step 6: Final answer
    x = 1,257.76

Related Problems

Find fourth proportional to 631.28, 870 and 456.32
Half scale
Find fourth proportional to 2,525.12, 3,480 and 1,825.28
Double scale
Find fourth proportional to 1,263.56, 1,741.38 and 913.64
Similar ratio
Find fourth proportional to 1,893.84, 2,610 and 1,368.96
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.