Home / 840.32-1,160-564.48

Finding the Fourth Proportional to 840.32, 1,160 and 564.48

Calculator

Solution

The fourth proportional to 840.32, 1,160 and 564.48 is: 779.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.32 : 1,160 = 564.48 : x
  2. Step 2: Convert to fraction form
    840.32/1,160 = 564.48/x
  3. Step 3: Cross multiply
    840.32x = 1,160 × 564.48
  4. Step 4: Simplify right side
    840.32x = 654,796.80
  5. Step 5: Solve for x
    x = 654,796.80/840.32
  6. Step 6: Final answer
    x = 779.22

Related Problems

Find fourth proportional to 420.16, 580 and 282.24
Half scale
Find fourth proportional to 1,680.64, 2,320 and 1,128.96
Double scale
Find fourth proportional to 841.32, 1,161.38 and 565.48
Similar ratio
Find fourth proportional to 1,260.48, 1,740 and 846.72
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.