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Finding the Fourth Proportional to 648,078.20, 972,117.30 and 411,590.60

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Solution

The fourth proportional to 648,078.20, 972,117.30 and 411,590.60 is: 617,385.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,078.20 : 972,117.30 = 411,590.60 : x
  2. Step 2: Convert to fraction form
    648,078.20/972,117.30 = 411,590.60/x
  3. Step 3: Cross multiply
    648,078.20x = 972,117.30 × 411,590.60
  4. Step 4: Simplify right side
    648,078.20x = 400,114,342,777.38
  5. Step 5: Solve for x
    x = 400,114,342,777.38/648,078.20
  6. Step 6: Final answer
    x = 617,385.90

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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.