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Finding the Fourth Proportional to 619,790.40, 929,685.60 and 430,833.60

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Solution

The fourth proportional to 619,790.40, 929,685.60 and 430,833.60 is: 646,250.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,790.40 : 929,685.60 = 430,833.60 : x
  2. Step 2: Convert to fraction form
    619,790.40/929,685.60 = 430,833.60/x
  3. Step 3: Cross multiply
    619,790.40x = 929,685.60 × 430,833.60
  4. Step 4: Simplify right side
    619,790.40x = 400,539,793,916.16
  5. Step 5: Solve for x
    x = 400,539,793,916.16/619,790.40
  6. Step 6: Final answer
    x = 646,250.40

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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.