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Finding the Fourth Proportional to 289,885.60, 434,828.40 and 251,005.60

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Solution

The fourth proportional to 289,885.60, 434,828.40 and 251,005.60 is: 376,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,885.60 : 434,828.40 = 251,005.60 : x
  2. Step 2: Convert to fraction form
    289,885.60/434,828.40 = 251,005.60/x
  3. Step 3: Cross multiply
    289,885.60x = 434,828.40 × 251,005.60
  4. Step 4: Simplify right side
    289,885.60x = 109,144,363,439.04
  5. Step 5: Solve for x
    x = 109,144,363,439.04/289,885.60
  6. Step 6: Final answer
    x = 376,508.40

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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.