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Finding the Fourth Proportional to 619,454.80, 928,015.80 and 318,912.40

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Solution

The fourth proportional to 619,454.80, 928,015.80 and 318,912.40 is: 477,768.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,454.80 : 928,015.80 = 318,912.40 : x
  2. Step 2: Convert to fraction form
    619,454.80/928,015.80 = 318,912.40/x
  3. Step 3: Cross multiply
    619,454.80x = 928,015.80 × 318,912.40
  4. Step 4: Simplify right side
    619,454.80x = 295,955,746,015.92
  5. Step 5: Solve for x
    x = 295,955,746,015.92/619,454.80
  6. Step 6: Final answer
    x = 477,768.11

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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.