Home / 645-967.50-521.52

Finding the Fourth Proportional to 645, 967.50 and 521.52

Calculator

Solution

The fourth proportional to 645, 967.50 and 521.52 is: 782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645 : 967.50 = 521.52 : x
  2. Step 2: Convert to fraction form
    645/967.50 = 521.52/x
  3. Step 3: Cross multiply
    645x = 967.50 × 521.52
  4. Step 4: Simplify right side
    645x = 504,570.60
  5. Step 5: Solve for x
    x = 504,570.60/645
  6. Step 6: Final answer
    x = 782.28

Related Problems

Find fourth proportional to 322.50, 483.75 and 260.76
Half scale
Find fourth proportional to 1,290, 1,935 and 1,043.04
Double scale
Find fourth proportional to 646, 969 and 522.52
Similar ratio
Find fourth proportional to 967.50, 1,451.25 and 782.28
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.