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Finding the Fourth Proportional to 620,632.68, 931,021.92 and 221,330.22

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Solution

The fourth proportional to 620,632.68, 931,021.92 and 221,330.22 is: 332,021.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,632.68 : 931,021.92 = 221,330.22 : x
  2. Step 2: Convert to fraction form
    620,632.68/931,021.92 = 221,330.22/x
  3. Step 3: Cross multiply
    620,632.68x = 931,021.92 × 221,330.22
  4. Step 4: Simplify right side
    620,632.68x = 206,063,286,378.42
  5. Step 5: Solve for x
    x = 206,063,286,378.42/620,632.68
  6. Step 6: Final answer
    x = 332,021.33

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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.