Home / 899.76-1,350-315

Finding the Fourth Proportional to 899.76, 1,350 and 315

Calculator

Solution

The fourth proportional to 899.76, 1,350 and 315 is: 472.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.76 : 1,350 = 315 : x
  2. Step 2: Convert to fraction form
    899.76/1,350 = 315/x
  3. Step 3: Cross multiply
    899.76x = 1,350 × 315
  4. Step 4: Simplify right side
    899.76x = 425,250
  5. Step 5: Solve for x
    x = 425,250/899.76
  6. Step 6: Final answer
    x = 472.63

Related Problems

Find fourth proportional to 449.88, 675 and 157.50
Half scale
Find fourth proportional to 1,799.52, 2,700 and 630
Double scale
Find fourth proportional to 900.76, 1,351.50 and 316
Similar ratio
Find fourth proportional to 1,349.64, 2,025 and 472.50
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.