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Finding the Fourth Proportional to 621,000.85, 930,353.10 and 353,968.15

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Solution

The fourth proportional to 621,000.85, 930,353.10 and 353,968.15 is: 530,297.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.85 : 930,353.10 = 353,968.15 : x
  2. Step 2: Convert to fraction form
    621,000.85/930,353.10 = 353,968.15/x
  3. Step 3: Cross multiply
    621,000.85x = 930,353.10 × 353,968.15
  4. Step 4: Simplify right side
    621,000.85x = 329,315,365,653.77
  5. Step 5: Solve for x
    x = 329,315,365,653.77/621,000.85
  6. Step 6: Final answer
    x = 530,297.77

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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.