Home / 507-699.72-300

Finding the Fourth Proportional to 507, 699.72 and 300

Calculator

Solution

The fourth proportional to 507, 699.72 and 300 is: 414.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    507 : 699.72 = 300 : x
  2. Step 2: Convert to fraction form
    507/699.72 = 300/x
  3. Step 3: Cross multiply
    507x = 699.72 × 300
  4. Step 4: Simplify right side
    507x = 209,916
  5. Step 5: Solve for x
    x = 209,916/507
  6. Step 6: Final answer
    x = 414.04

Related Problems

Find fourth proportional to 253.50, 349.86 and 150
Half scale
Find fourth proportional to 1,014, 1,399.44 and 600
Double scale
Find fourth proportional to 508, 701.10 and 301
Similar ratio
Find fourth proportional to 760.50, 1,049.58 and 450
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.