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Finding the Fourth Proportional to 280,568.72, 420,856.92 and 93,580.40

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Solution

The fourth proportional to 280,568.72, 420,856.92 and 93,580.40 is: 140,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,568.72 : 420,856.92 = 93,580.40 : x
  2. Step 2: Convert to fraction form
    280,568.72/420,856.92 = 93,580.40/x
  3. Step 3: Cross multiply
    280,568.72x = 420,856.92 × 93,580.40
  4. Step 4: Simplify right side
    280,568.72x = 39,383,958,916.37
  5. Step 5: Solve for x
    x = 39,383,958,916.37/280,568.72
  6. Step 6: Final answer
    x = 140,371.88

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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.