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Finding the Fourth Proportional to 620,086.20, 930,129.30 and 615,420.60

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Solution

The fourth proportional to 620,086.20, 930,129.30 and 615,420.60 is: 923,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,086.20 : 930,129.30 = 615,420.60 : x
  2. Step 2: Convert to fraction form
    620,086.20/930,129.30 = 615,420.60/x
  3. Step 3: Cross multiply
    620,086.20x = 930,129.30 × 615,420.60
  4. Step 4: Simplify right side
    620,086.20x = 572,420,731,883.58
  5. Step 5: Solve for x
    x = 572,420,731,883.58/620,086.20
  6. Step 6: Final answer
    x = 923,130.90

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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.