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Finding the Fourth Proportional to 620,636.93, 931,028.31 and 221,334.47

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Solution

The fourth proportional to 620,636.93, 931,028.31 and 221,334.47 is: 332,027.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,636.93 : 931,028.31 = 221,334.47 : x
  2. Step 2: Convert to fraction form
    620,636.93/931,028.31 = 221,334.47/x
  3. Step 3: Cross multiply
    620,636.93x = 931,028.31 × 221,334.47
  4. Step 4: Simplify right side
    620,636.93x = 206,068,656,442.17
  5. Step 5: Solve for x
    x = 206,068,656,442.17/620,636.93
  6. Step 6: Final answer
    x = 332,027.71

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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.