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Finding the Fourth Proportional to 660,685.29, 911,873.52 and 430,843.55

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Solution

The fourth proportional to 660,685.29, 911,873.52 and 430,843.55 is: 594,647.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,685.29 : 911,873.52 = 430,843.55 : x
  2. Step 2: Convert to fraction form
    660,685.29/911,873.52 = 430,843.55/x
  3. Step 3: Cross multiply
    660,685.29x = 911,873.52 × 430,843.55
  4. Step 4: Simplify right side
    660,685.29x = 392,874,819,948.43
  5. Step 5: Solve for x
    x = 392,874,819,948.43/660,685.29
  6. Step 6: Final answer
    x = 594,647.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.