Home / 186.65-280-64.90

Finding the Fourth Proportional to 186.65, 280 and 64.90

Calculator

Solution

The fourth proportional to 186.65, 280 and 64.90 is: 97.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.65 : 280 = 64.90 : x
  2. Step 2: Convert to fraction form
    186.65/280 = 64.90/x
  3. Step 3: Cross multiply
    186.65x = 280 × 64.90
  4. Step 4: Simplify right side
    186.65x = 18,170.60
  5. Step 5: Solve for x
    x = 18,170.60/186.65
  6. Step 6: Final answer
    x = 97.35

Related Problems

Find fourth proportional to 93.33, 140 and 32.45
Half scale
Find fourth proportional to 373.30, 560 and 129.79
Double scale
Find fourth proportional to 187.65, 281.50 and 65.90
Similar ratio
Find fourth proportional to 279.98, 420 and 97.34
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.