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Finding the Fourth Proportional to 662,140.70, 993,211.05 and 620,668.70

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Solution

The fourth proportional to 662,140.70, 993,211.05 and 620,668.70 is: 931,003.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,140.70 : 993,211.05 = 620,668.70 : x
  2. Step 2: Convert to fraction form
    662,140.70/993,211.05 = 620,668.70/x
  3. Step 3: Cross multiply
    662,140.70x = 993,211.05 × 620,668.70
  4. Step 4: Simplify right side
    662,140.70x = 616,455,011,229.14
  5. Step 5: Solve for x
    x = 616,455,011,229.14/662,140.70
  6. Step 6: Final answer
    x = 931,003.05

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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.