Home / 532.65-734.20-420.43

Finding the Fourth Proportional to 532.65, 734.20 and 420.43

Calculator

Solution

The fourth proportional to 532.65, 734.20 and 420.43 is: 579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.65 : 734.20 = 420.43 : x
  2. Step 2: Convert to fraction form
    532.65/734.20 = 420.43/x
  3. Step 3: Cross multiply
    532.65x = 734.20 × 420.43
  4. Step 4: Simplify right side
    532.65x = 308,679.71
  5. Step 5: Solve for x
    x = 308,679.71/532.65
  6. Step 6: Final answer
    x = 579.52

Related Problems

Find fourth proportional to 266.33, 367.10 and 210.22
Half scale
Find fourth proportional to 1,065.30, 1,468.40 and 840.86
Double scale
Find fourth proportional to 533.65, 735.58 and 421.43
Similar ratio
Find fourth proportional to 798.98, 1,101.30 and 630.65
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.