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Finding the Fourth Proportional to 624,012.80, 936,019.20 and 386,585.60

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Solution

The fourth proportional to 624,012.80, 936,019.20 and 386,585.60 is: 579,878.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,012.80 : 936,019.20 = 386,585.60 : x
  2. Step 2: Convert to fraction form
    624,012.80/936,019.20 = 386,585.60/x
  3. Step 3: Cross multiply
    624,012.80x = 936,019.20 × 386,585.60
  4. Step 4: Simplify right side
    624,012.80x = 361,851,544,043.52
  5. Step 5: Solve for x
    x = 361,851,544,043.52/624,012.80
  6. Step 6: Final answer
    x = 579,878.40

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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.