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Finding the Fourth Proportional to 620,633.60, 930,950.40 and 408,057.20

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Solution

The fourth proportional to 620,633.60, 930,950.40 and 408,057.20 is: 612,085.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,633.60 : 930,950.40 = 408,057.20 : x
  2. Step 2: Convert to fraction form
    620,633.60/930,950.40 = 408,057.20/x
  3. Step 3: Cross multiply
    620,633.60x = 930,950.40 × 408,057.20
  4. Step 4: Simplify right side
    620,633.60x = 379,881,013,562.88
  5. Step 5: Solve for x
    x = 379,881,013,562.88/620,633.60
  6. Step 6: Final answer
    x = 612,085.80

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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.