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Finding the Fourth Proportional to 699,355.98, 965,102.04 and 393,431.40

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Solution

The fourth proportional to 699,355.98, 965,102.04 and 393,431.40 is: 542,930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,355.98 : 965,102.04 = 393,431.40 : x
  2. Step 2: Convert to fraction form
    699,355.98/965,102.04 = 393,431.40/x
  3. Step 3: Cross multiply
    699,355.98x = 965,102.04 × 393,431.40
  4. Step 4: Simplify right side
    699,355.98x = 379,701,446,740.06
  5. Step 5: Solve for x
    x = 379,701,446,740.06/699,355.98
  6. Step 6: Final answer
    x = 542,930.15

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.