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Finding the Fourth Proportional to 579,774.40, 869,661.60 and 511,345.60

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Solution

The fourth proportional to 579,774.40, 869,661.60 and 511,345.60 is: 767,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,774.40 : 869,661.60 = 511,345.60 : x
  2. Step 2: Convert to fraction form
    579,774.40/869,661.60 = 511,345.60/x
  3. Step 3: Cross multiply
    579,774.40x = 869,661.60 × 511,345.60
  4. Step 4: Simplify right side
    579,774.40x = 444,697,632,648.96
  5. Step 5: Solve for x
    x = 444,697,632,648.96/579,774.40
  6. Step 6: Final answer
    x = 767,018.40

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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.