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Finding the Fourth Proportional to 638,408.40, 957,612.60 and 559,611.60

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Solution

The fourth proportional to 638,408.40, 957,612.60 and 559,611.60 is: 839,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,408.40 : 957,612.60 = 559,611.60 : x
  2. Step 2: Convert to fraction form
    638,408.40/957,612.60 = 559,611.60/x
  3. Step 3: Cross multiply
    638,408.40x = 957,612.60 × 559,611.60
  4. Step 4: Simplify right side
    638,408.40x = 535,891,119,266.16
  5. Step 5: Solve for x
    x = 535,891,119,266.16/638,408.40
  6. Step 6: Final answer
    x = 839,417.40

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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.