Home / 621,138.60-931,489.20-221,792.40

Finding the Fourth Proportional to 621,138.60, 931,489.20 and 221,792.40

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Solution

The fourth proportional to 621,138.60, 931,489.20 and 221,792.40 is: 332,610.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,138.60 : 931,489.20 = 221,792.40 : x
  2. Step 2: Convert to fraction form
    621,138.60/931,489.20 = 221,792.40/x
  3. Step 3: Cross multiply
    621,138.60x = 931,489.20 × 221,792.40
  4. Step 4: Simplify right side
    621,138.60x = 206,597,225,242.08
  5. Step 5: Solve for x
    x = 206,597,225,242.08/621,138.60
  6. Step 6: Final answer
    x = 332,610.51

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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.