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Finding the Fourth Proportional to 519,211.40, 778,817.10 and 414,235.40

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Solution

The fourth proportional to 519,211.40, 778,817.10 and 414,235.40 is: 621,353.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,211.40 : 778,817.10 = 414,235.40 : x
  2. Step 2: Convert to fraction form
    519,211.40/778,817.10 = 414,235.40/x
  3. Step 3: Cross multiply
    519,211.40x = 778,817.10 × 414,235.40
  4. Step 4: Simplify right side
    519,211.40x = 322,613,612,945.34
  5. Step 5: Solve for x
    x = 322,613,612,945.34/519,211.40
  6. Step 6: Final answer
    x = 621,353.10

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Half scale
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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.