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Finding the Fourth Proportional to 659,617.80, 989,426.70 and 622,876.20

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Solution

The fourth proportional to 659,617.80, 989,426.70 and 622,876.20 is: 934,314.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,617.80 : 989,426.70 = 622,876.20 : x
  2. Step 2: Convert to fraction form
    659,617.80/989,426.70 = 622,876.20/x
  3. Step 3: Cross multiply
    659,617.80x = 989,426.70 × 622,876.20
  4. Step 4: Simplify right side
    659,617.80x = 616,290,343,074.54
  5. Step 5: Solve for x
    x = 616,290,343,074.54/659,617.80
  6. Step 6: Final answer
    x = 934,314.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.