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Finding the Fourth Proportional to 716,706.09, 989,032.82 and 394,415.73

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Solution

The fourth proportional to 716,706.09, 989,032.82 and 394,415.73 is: 544,281.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,706.09 : 989,032.82 = 394,415.73 : x
  2. Step 2: Convert to fraction form
    716,706.09/989,032.82 = 394,415.73/x
  3. Step 3: Cross multiply
    716,706.09x = 989,032.82 × 394,415.73
  4. Step 4: Simplify right side
    716,706.09x = 390,090,099,722.18
  5. Step 5: Solve for x
    x = 390,090,099,722.18/716,706.09
  6. Step 6: Final answer
    x = 544,281.83

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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.