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Finding the Fourth Proportional to 619,455.80, 928,017.30 and 318,913.40

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Solution

The fourth proportional to 619,455.80, 928,017.30 and 318,913.40 is: 477,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,455.80 : 928,017.30 = 318,913.40 : x
  2. Step 2: Convert to fraction form
    619,455.80/928,017.30 = 318,913.40/x
  3. Step 3: Cross multiply
    619,455.80x = 928,017.30 × 318,913.40
  4. Step 4: Simplify right side
    619,455.80x = 295,957,152,401.82
  5. Step 5: Solve for x
    x = 295,957,152,401.82/619,455.80
  6. Step 6: Final answer
    x = 477,769.60

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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.