Home / 388.01-535.93-309.62

Finding the Fourth Proportional to 388.01, 535.93 and 309.62

Calculator

Solution

The fourth proportional to 388.01, 535.93 and 309.62 is: 427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.01 : 535.93 = 309.62 : x
  2. Step 2: Convert to fraction form
    388.01/535.93 = 309.62/x
  3. Step 3: Cross multiply
    388.01x = 535.93 × 309.62
  4. Step 4: Simplify right side
    388.01x = 165,935.21
  5. Step 5: Solve for x
    x = 165,935.21/388.01
  6. Step 6: Final answer
    x = 427.65

Related Problems

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.