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Finding the Fourth Proportional to 620,633.18, 931,022.68 and 221,330.72

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Solution

The fourth proportional to 620,633.18, 931,022.68 and 221,330.72 is: 332,022.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,633.18 : 931,022.68 = 221,330.72 : x
  2. Step 2: Convert to fraction form
    620,633.18/931,022.68 = 221,330.72/x
  3. Step 3: Cross multiply
    620,633.18x = 931,022.68 × 221,330.72
  4. Step 4: Simplify right side
    620,633.18x = 206,063,920,100.73
  5. Step 5: Solve for x
    x = 206,063,920,100.73/620,633.18
  6. Step 6: Final answer
    x = 332,022.08

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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.