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Finding the Fourth Proportional to 716,947.06, 989,379.30 and 394,650.40

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Solution

The fourth proportional to 716,947.06, 989,379.30 and 394,650.40 is: 544,613.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,947.06 : 989,379.30 = 394,650.40 : x
  2. Step 2: Convert to fraction form
    716,947.06/989,379.30 = 394,650.40/x
  3. Step 3: Cross multiply
    716,947.06x = 989,379.30 × 394,650.40
  4. Step 4: Simplify right side
    716,947.06x = 390,458,936,496.72
  5. Step 5: Solve for x
    x = 390,458,936,496.72/716,947.06
  6. Step 6: Final answer
    x = 544,613.34

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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.