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Finding the Fourth Proportional to 539,136.40, 808,704.60 and 434,160.40

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Solution

The fourth proportional to 539,136.40, 808,704.60 and 434,160.40 is: 651,240.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,136.40 : 808,704.60 = 434,160.40 : x
  2. Step 2: Convert to fraction form
    539,136.40/808,704.60 = 434,160.40/x
  3. Step 3: Cross multiply
    539,136.40x = 808,704.60 × 434,160.40
  4. Step 4: Simplify right side
    539,136.40x = 351,107,512,617.84
  5. Step 5: Solve for x
    x = 351,107,512,617.84/539,136.40
  6. Step 6: Final answer
    x = 651,240.60

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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.