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Finding the Fourth Proportional to 911,915.20, 1,258,596.06 and 617,431.36

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Solution

The fourth proportional to 911,915.20, 1,258,596.06 and 617,431.36 is: 852,158.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,915.20 : 1,258,596.06 = 617,431.36 : x
  2. Step 2: Convert to fraction form
    911,915.20/1,258,596.06 = 617,431.36/x
  3. Step 3: Cross multiply
    911,915.20x = 1,258,596.06 × 617,431.36
  4. Step 4: Simplify right side
    911,915.20x = 777,096,677,016.44
  5. Step 5: Solve for x
    x = 777,096,677,016.44/911,915.20
  6. Step 6: Final answer
    x = 852,158.93

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1.5x scale

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.