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Finding the Fourth Proportional to 1,375,996,815.65, 1,931,837,497.75 and 1,375,996,815.65

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Solution

The fourth proportional to 1,375,996,815.65, 1,931,837,497.75 and 1,375,996,815.65 is: 1,931,837,497.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,996,815.65 : 1,931,837,497.75 = 1,375,996,815.65 : x
  2. Step 2: Convert to fraction form
    1,375,996,815.65/1,931,837,497.75 = 1,375,996,815.65/x
  3. Step 3: Cross multiply
    1,375,996,815.65x = 1,931,837,497.75 × 1,375,996,815.65
  4. Step 4: Simplify right side
    1,375,996,815.65x = 2,658,202,245,257,264,128
  5. Step 5: Solve for x
    x = 2,658,202,245,257,264,128/1,375,996,815.65
  6. Step 6: Final answer
    x = 1,931,837,497.75

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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.