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Finding the Fourth Proportional to 621,720.60, 932,580.90 and 611,352.60

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Solution

The fourth proportional to 621,720.60, 932,580.90 and 611,352.60 is: 917,028.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,720.60 : 932,580.90 = 611,352.60 : x
  2. Step 2: Convert to fraction form
    621,720.60/932,580.90 = 611,352.60/x
  3. Step 3: Cross multiply
    621,720.60x = 932,580.90 × 611,352.60
  4. Step 4: Simplify right side
    621,720.60x = 570,135,757,925.34
  5. Step 5: Solve for x
    x = 570,135,757,925.34/621,720.60
  6. Step 6: Final answer
    x = 917,028.90

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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.