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Finding the Fourth Proportional to 622,802.40, 934,203.60 and 398,416.20

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Solution

The fourth proportional to 622,802.40, 934,203.60 and 398,416.20 is: 597,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,802.40 : 934,203.60 = 398,416.20 : x
  2. Step 2: Convert to fraction form
    622,802.40/934,203.60 = 398,416.20/x
  3. Step 3: Cross multiply
    622,802.40x = 934,203.60 × 398,416.20
  4. Step 4: Simplify right side
    622,802.40x = 372,201,848,338.32
  5. Step 5: Solve for x
    x = 372,201,848,338.32/622,802.40
  6. Step 6: Final answer
    x = 597,624.30

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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.