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Finding the Fourth Proportional to 624,005.20, 936,007.80 and 617,784.40

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Solution

The fourth proportional to 624,005.20, 936,007.80 and 617,784.40 is: 926,676.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,005.20 : 936,007.80 = 617,784.40 : x
  2. Step 2: Convert to fraction form
    624,005.20/936,007.80 = 617,784.40/x
  3. Step 3: Cross multiply
    624,005.20x = 936,007.80 × 617,784.40
  4. Step 4: Simplify right side
    624,005.20x = 578,251,017,118.32
  5. Step 5: Solve for x
    x = 578,251,017,118.32/624,005.20
  6. Step 6: Final answer
    x = 926,676.60

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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.