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Finding the Fourth Proportional to 715,669,855.90, 1,071,993,129.45 and 715,669,855.90

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Solution

The fourth proportional to 715,669,855.90, 1,071,993,129.45 and 715,669,855.90 is: 1,071,993,129.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,669,855.90 : 1,071,993,129.45 = 715,669,855.90 : x
  2. Step 2: Convert to fraction form
    715,669,855.90/1,071,993,129.45 = 715,669,855.90/x
  3. Step 3: Cross multiply
    715,669,855.90x = 1,071,993,129.45 × 715,669,855.90
  4. Step 4: Simplify right side
    715,669,855.90x = 767,193,168,479,271,552
  5. Step 5: Solve for x
    x = 767,193,168,479,271,552/715,669,855.90
  6. Step 6: Final answer
    x = 1,071,993,129.45

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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.