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Finding the Fourth Proportional to 1,210,890,645.10, 1,696,394,815.70 and 1,210,890,645.10

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Solution

The fourth proportional to 1,210,890,645.10, 1,696,394,815.70 and 1,210,890,645.10 is: 1,696,394,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,890,645.10 : 1,696,394,815.70 = 1,210,890,645.10 : x
  2. Step 2: Convert to fraction form
    1,210,890,645.10/1,696,394,815.70 = 1,210,890,645.10/x
  3. Step 3: Cross multiply
    1,210,890,645.10x = 1,696,394,815.70 × 1,210,890,645.10
  4. Step 4: Simplify right side
    1,210,890,645.10x = 2,054,148,612,727,268,608
  5. Step 5: Solve for x
    x = 2,054,148,612,727,268,608/1,210,890,645.10
  6. Step 6: Final answer
    x = 1,696,394,815.70

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.