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Finding the Fourth Proportional to 620,438.70, 930,658.05 and 407,862.30

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Solution

The fourth proportional to 620,438.70, 930,658.05 and 407,862.30 is: 611,793.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,438.70 : 930,658.05 = 407,862.30 : x
  2. Step 2: Convert to fraction form
    620,438.70/930,658.05 = 407,862.30/x
  3. Step 3: Cross multiply
    620,438.70x = 930,658.05 × 407,862.30
  4. Step 4: Simplify right side
    620,438.70x = 379,580,332,786.52
  5. Step 5: Solve for x
    x = 379,580,332,786.52/620,438.70
  6. Step 6: Final answer
    x = 611,793.45

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Similar ratio
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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.