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Finding the Fourth Proportional to 630,155.80, 945,233.70 and 393,765.40

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Solution

The fourth proportional to 630,155.80, 945,233.70 and 393,765.40 is: 590,648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,155.80 : 945,233.70 = 393,765.40 : x
  2. Step 2: Convert to fraction form
    630,155.80/945,233.70 = 393,765.40/x
  3. Step 3: Cross multiply
    630,155.80x = 945,233.70 × 393,765.40
  4. Step 4: Simplify right side
    630,155.80x = 372,200,325,973.98
  5. Step 5: Solve for x
    x = 372,200,325,973.98/630,155.80
  6. Step 6: Final answer
    x = 590,648.10

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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.