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Finding the Fourth Proportional to 545,782.60, 818,673.90 and 411,938.20

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Solution

The fourth proportional to 545,782.60, 818,673.90 and 411,938.20 is: 617,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,782.60 : 818,673.90 = 411,938.20 : x
  2. Step 2: Convert to fraction form
    545,782.60/818,673.90 = 411,938.20/x
  3. Step 3: Cross multiply
    545,782.60x = 818,673.90 × 411,938.20
  4. Step 4: Simplify right side
    545,782.60x = 337,243,052,752.98
  5. Step 5: Solve for x
    x = 337,243,052,752.98/545,782.60
  6. Step 6: Final answer
    x = 617,907.30

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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.