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Finding the Fourth Proportional to 539,114.40, 808,671.60 and 434,138.40

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Solution

The fourth proportional to 539,114.40, 808,671.60 and 434,138.40 is: 651,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,114.40 : 808,671.60 = 434,138.40 : x
  2. Step 2: Convert to fraction form
    539,114.40/808,671.60 = 434,138.40/x
  3. Step 3: Cross multiply
    539,114.40x = 808,671.60 × 434,138.40
  4. Step 4: Simplify right side
    539,114.40x = 351,075,394,549.44
  5. Step 5: Solve for x
    x = 351,075,394,549.44/539,114.40
  6. Step 6: Final answer
    x = 651,207.60

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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.