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Finding the Fourth Proportional to 289,790.80, 434,686.20 and 195,787.60

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Solution

The fourth proportional to 289,790.80, 434,686.20 and 195,787.60 is: 293,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,790.80 : 434,686.20 = 195,787.60 : x
  2. Step 2: Convert to fraction form
    289,790.80/434,686.20 = 195,787.60/x
  3. Step 3: Cross multiply
    289,790.80x = 434,686.20 × 195,787.60
  4. Step 4: Simplify right side
    289,790.80x = 85,106,167,851.12
  5. Step 5: Solve for x
    x = 85,106,167,851.12/289,790.80
  6. Step 6: Final answer
    x = 293,681.40

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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.