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Finding the Fourth Proportional to 624,220.70, 936,331.05 and 617,999.90

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Solution

The fourth proportional to 624,220.70, 936,331.05 and 617,999.90 is: 926,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,220.70 : 936,331.05 = 617,999.90 : x
  2. Step 2: Convert to fraction form
    624,220.70/936,331.05 = 617,999.90/x
  3. Step 3: Cross multiply
    624,220.70x = 936,331.05 × 617,999.90
  4. Step 4: Simplify right side
    624,220.70x = 578,652,495,266.90
  5. Step 5: Solve for x
    x = 578,652,495,266.90/624,220.70
  6. Step 6: Final answer
    x = 926,999.85

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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.