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Finding the Fourth Proportional to 581,697.80, 872,546.70 and 345,768.20

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Solution

The fourth proportional to 581,697.80, 872,546.70 and 345,768.20 is: 518,652.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,697.80 : 872,546.70 = 345,768.20 : x
  2. Step 2: Convert to fraction form
    581,697.80/872,546.70 = 345,768.20/x
  3. Step 3: Cross multiply
    581,697.80x = 872,546.70 × 345,768.20
  4. Step 4: Simplify right side
    581,697.80x = 301,698,901,874.94
  5. Step 5: Solve for x
    x = 301,698,901,874.94/581,697.80
  6. Step 6: Final answer
    x = 518,652.30

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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.