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Finding the Fourth Proportional to 620,841.60, 931,481.10 and 305,087.40

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Solution

The fourth proportional to 620,841.60, 931,481.10 and 305,087.40 is: 457,738.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,841.60 : 931,481.10 = 305,087.40 : x
  2. Step 2: Convert to fraction form
    620,841.60/931,481.10 = 305,087.40/x
  3. Step 3: Cross multiply
    620,841.60x = 931,481.10 × 305,087.40
  4. Step 4: Simplify right side
    620,841.60x = 284,183,146,948.14
  5. Step 5: Solve for x
    x = 284,183,146,948.14/620,841.60
  6. Step 6: Final answer
    x = 457,738.57

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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.