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Finding the Fourth Proportional to 620,617.70, 930,926.55 and 408,041.30

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Solution

The fourth proportional to 620,617.70, 930,926.55 and 408,041.30 is: 612,061.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,617.70 : 930,926.55 = 408,041.30 : x
  2. Step 2: Convert to fraction form
    620,617.70/930,926.55 = 408,041.30/x
  3. Step 3: Cross multiply
    620,617.70x = 930,926.55 × 408,041.30
  4. Step 4: Simplify right side
    620,617.70x = 379,856,479,666.52
  5. Step 5: Solve for x
    x = 379,856,479,666.52/620,617.70
  6. Step 6: Final answer
    x = 612,061.95

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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.