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Finding the Fourth Proportional to 823,801.60, 1,235,702.40 and 291,318.40

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Solution

The fourth proportional to 823,801.60, 1,235,702.40 and 291,318.40 is: 436,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,801.60 : 1,235,702.40 = 291,318.40 : x
  2. Step 2: Convert to fraction form
    823,801.60/1,235,702.40 = 291,318.40/x
  3. Step 3: Cross multiply
    823,801.60x = 1,235,702.40 × 291,318.40
  4. Step 4: Simplify right side
    823,801.60x = 359,982,846,044.16
  5. Step 5: Solve for x
    x = 359,982,846,044.16/823,801.60
  6. Step 6: Final answer
    x = 436,977.60

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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.