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Finding the Fourth Proportional to 620,439.60, 930,821.40 and 199,725.60

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Solution

The fourth proportional to 620,439.60, 930,821.40 and 199,725.60 is: 299,640.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,439.60 : 930,821.40 = 199,725.60 : x
  2. Step 2: Convert to fraction form
    620,439.60/930,821.40 = 199,725.60/x
  3. Step 3: Cross multiply
    620,439.60x = 930,821.40 × 199,725.60
  4. Step 4: Simplify right side
    620,439.60x = 185,908,862,607.84
  5. Step 5: Solve for x
    x = 185,908,862,607.84/620,439.60
  6. Step 6: Final answer
    x = 299,640.55

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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.