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Finding the Fourth Proportional to 638,904.30, 958,356.45 and 543,915.60

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Solution

The fourth proportional to 638,904.30, 958,356.45 and 543,915.60 is: 815,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,904.30 : 958,356.45 = 543,915.60 : x
  2. Step 2: Convert to fraction form
    638,904.30/958,356.45 = 543,915.60/x
  3. Step 3: Cross multiply
    638,904.30x = 958,356.45 × 543,915.60
  4. Step 4: Simplify right side
    638,904.30x = 521,265,023,515.62
  5. Step 5: Solve for x
    x = 521,265,023,515.62/638,904.30
  6. Step 6: Final answer
    x = 815,873.40

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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.