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Finding the Fourth Proportional to 638,809.60, 958,214.40 and 607,705.60

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Solution

The fourth proportional to 638,809.60, 958,214.40 and 607,705.60 is: 911,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,809.60 : 958,214.40 = 607,705.60 : x
  2. Step 2: Convert to fraction form
    638,809.60/958,214.40 = 607,705.60/x
  3. Step 3: Cross multiply
    638,809.60x = 958,214.40 × 607,705.60
  4. Step 4: Simplify right side
    638,809.60x = 582,312,256,880.64
  5. Step 5: Solve for x
    x = 582,312,256,880.64/638,809.60
  6. Step 6: Final answer
    x = 911,558.40

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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.