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Finding the Fourth Proportional to 623,730.60, 936,287.10 and 387,340.20

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Solution

The fourth proportional to 623,730.60, 936,287.10 and 387,340.20 is: 581,439.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,730.60 : 936,287.10 = 387,340.20 : x
  2. Step 2: Convert to fraction form
    623,730.60/936,287.10 = 387,340.20/x
  3. Step 3: Cross multiply
    623,730.60x = 936,287.10 × 387,340.20
  4. Step 4: Simplify right side
    623,730.60x = 362,661,632,571.42
  5. Step 5: Solve for x
    x = 362,661,632,571.42/623,730.60
  6. Step 6: Final answer
    x = 581,439.54

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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.