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Finding the Fourth Proportional to 383,476.46, 530,154.11 and 287,817.08

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Solution

The fourth proportional to 383,476.46, 530,154.11 and 287,817.08 is: 397,905.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,476.46 : 530,154.11 = 287,817.08 : x
  2. Step 2: Convert to fraction form
    383,476.46/530,154.11 = 287,817.08/x
  3. Step 3: Cross multiply
    383,476.46x = 530,154.11 × 287,817.08
  4. Step 4: Simplify right side
    383,476.46x = 152,587,403,800.34
  5. Step 5: Solve for x
    x = 152,587,403,800.34/383,476.46
  6. Step 6: Final answer
    x = 397,905.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.