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Finding the Fourth Proportional to 620,602.33, 930,903.55 and 199,878.20

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Solution

The fourth proportional to 620,602.33, 930,903.55 and 199,878.20 is: 299,817.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,602.33 : 930,903.55 = 199,878.20 : x
  2. Step 2: Convert to fraction form
    620,602.33/930,903.55 = 199,878.20/x
  3. Step 3: Cross multiply
    620,602.33x = 930,903.55 × 199,878.20
  4. Step 4: Simplify right side
    620,602.33x = 186,067,325,947.61
  5. Step 5: Solve for x
    x = 186,067,325,947.61/620,602.33
  6. Step 6: Final answer
    x = 299,817.32

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Half scale
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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.