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Finding the Fourth Proportional to 911,657.42, 1,258,087.19 and 509,249.42

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Solution

The fourth proportional to 911,657.42, 1,258,087.19 and 509,249.42 is: 702,764.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,657.42 : 1,258,087.19 = 509,249.42 : x
  2. Step 2: Convert to fraction form
    911,657.42/1,258,087.19 = 509,249.42/x
  3. Step 3: Cross multiply
    911,657.42x = 1,258,087.19 × 509,249.42
  4. Step 4: Simplify right side
    911,657.42x = 640,680,171,816.93
  5. Step 5: Solve for x
    x = 640,680,171,816.93/911,657.42
  6. Step 6: Final answer
    x = 702,764.17

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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.