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Finding the Fourth Proportional to 699,798.18, 965,646.78 and 393,890.34

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Solution

The fourth proportional to 699,798.18, 965,646.78 and 393,890.34 is: 543,526.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,798.18 : 965,646.78 = 393,890.34 : x
  2. Step 2: Convert to fraction form
    699,798.18/965,646.78 = 393,890.34/x
  3. Step 3: Cross multiply
    699,798.18x = 965,646.78 × 393,890.34
  4. Step 4: Simplify right side
    699,798.18x = 380,358,938,494.11
  5. Step 5: Solve for x
    x = 380,358,938,494.11/699,798.18
  6. Step 6: Final answer
    x = 543,526.62

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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.