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Finding the Fourth Proportional to 623,880.60, 935,820.90 and 518,904.60

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Solution

The fourth proportional to 623,880.60, 935,820.90 and 518,904.60 is: 778,356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,880.60 : 935,820.90 = 518,904.60 : x
  2. Step 2: Convert to fraction form
    623,880.60/935,820.90 = 518,904.60/x
  3. Step 3: Cross multiply
    623,880.60x = 935,820.90 × 518,904.60
  4. Step 4: Simplify right side
    623,880.60x = 485,601,769,786.14
  5. Step 5: Solve for x
    x = 485,601,769,786.14/623,880.60
  6. Step 6: Final answer
    x = 778,356.90

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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.