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Finding the Fourth Proportional to 289,916.60, 434,874.90 and 195,438.20

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Solution

The fourth proportional to 289,916.60, 434,874.90 and 195,438.20 is: 293,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,916.60 : 434,874.90 = 195,438.20 : x
  2. Step 2: Convert to fraction form
    289,916.60/434,874.90 = 195,438.20/x
  3. Step 3: Cross multiply
    289,916.60x = 434,874.90 × 195,438.20
  4. Step 4: Simplify right side
    289,916.60x = 84,991,167,681.18
  5. Step 5: Solve for x
    x = 84,991,167,681.18/289,916.60
  6. Step 6: Final answer
    x = 293,157.30

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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.