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Finding the Fourth Proportional to 911,751.90, 1,258,216.47 and 509,343.90

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Solution

The fourth proportional to 911,751.90, 1,258,216.47 and 509,343.90 is: 702,893.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,751.90 : 1,258,216.47 = 509,343.90 : x
  2. Step 2: Convert to fraction form
    911,751.90/1,258,216.47 = 509,343.90/x
  3. Step 3: Cross multiply
    911,751.90x = 1,258,216.47 × 509,343.90
  4. Step 4: Simplify right side
    911,751.90x = 640,864,883,874.03
  5. Step 5: Solve for x
    x = 640,864,883,874.03/911,751.90
  6. Step 6: Final answer
    x = 702,893.94

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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.