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Finding the Fourth Proportional to 620,147.40, 930,221.10 and 199,465.80

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Solution

The fourth proportional to 620,147.40, 930,221.10 and 199,465.80 is: 299,198.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,147.40 : 930,221.10 = 199,465.80 : x
  2. Step 2: Convert to fraction form
    620,147.40/930,221.10 = 199,465.80/x
  3. Step 3: Cross multiply
    620,147.40x = 930,221.10 × 199,465.80
  4. Step 4: Simplify right side
    620,147.40x = 185,547,295,888.38
  5. Step 5: Solve for x
    x = 185,547,295,888.38/620,147.40
  6. Step 6: Final answer
    x = 299,198.70

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Double scale
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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.