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Finding the Fourth Proportional to 911,993.10, 1,258,421.90 and 519,536.38

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Solution

The fourth proportional to 911,993.10, 1,258,421.90 and 519,536.38 is: 716,886.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,993.10 : 1,258,421.90 = 519,536.38 : x
  2. Step 2: Convert to fraction form
    911,993.10/1,258,421.90 = 519,536.38/x
  3. Step 3: Cross multiply
    911,993.10x = 1,258,421.90 × 519,536.38
  4. Step 4: Simplify right side
    911,993.10x = 653,795,958,438.72
  5. Step 5: Solve for x
    x = 653,795,958,438.72/911,993.10
  6. Step 6: Final answer
    x = 716,886.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.