Home / 3,221.10-4,831.65-912.62

Finding the Fourth Proportional to 3,221.10, 4,831.65 and 912.62

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Solution

The fourth proportional to 3,221.10, 4,831.65 and 912.62 is: 1,368.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.10 : 4,831.65 = 912.62 : x
  2. Step 2: Convert to fraction form
    3,221.10/4,831.65 = 912.62/x
  3. Step 3: Cross multiply
    3,221.10x = 4,831.65 × 912.62
  4. Step 4: Simplify right side
    3,221.10x = 4,409,460.42
  5. Step 5: Solve for x
    x = 4,409,460.42/3,221.10
  6. Step 6: Final answer
    x = 1,368.93

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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.