Home / 324-485.28-276

Finding the Fourth Proportional to 324, 485.28 and 276

Calculator

Solution

The fourth proportional to 324, 485.28 and 276 is: 413.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    324 : 485.28 = 276 : x
  2. Step 2: Convert to fraction form
    324/485.28 = 276/x
  3. Step 3: Cross multiply
    324x = 485.28 × 276
  4. Step 4: Simplify right side
    324x = 133,937.28
  5. Step 5: Solve for x
    x = 133,937.28/324
  6. Step 6: Final answer
    x = 413.39

Related Problems

Find fourth proportional to 162, 242.64 and 138
Half scale
Find fourth proportional to 648, 970.56 and 552
Double scale
Find fourth proportional to 325, 486.78 and 277
Similar ratio
Find fourth proportional to 486, 727.92 and 414
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.