Home / 346.52-519.78-90

Finding the Fourth Proportional to 346.52, 519.78 and 90

Calculator

Solution

The fourth proportional to 346.52, 519.78 and 90 is: 135

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.52 : 519.78 = 90 : x
  2. Step 2: Convert to fraction form
    346.52/519.78 = 90/x
  3. Step 3: Cross multiply
    346.52x = 519.78 × 90
  4. Step 4: Simplify right side
    346.52x = 46,780.20
  5. Step 5: Solve for x
    x = 46,780.20/346.52
  6. Step 6: Final answer
    x = 135

Related Problems

Find fourth proportional to 173.26, 259.89 and 45
Half scale
Find fourth proportional to 693.04, 1,039.56 and 180
Double scale
Find fourth proportional to 347.52, 521.28 and 91
Similar ratio
Find fourth proportional to 519.78, 779.67 and 135
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.