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Finding the Fourth Proportional to 285,224.76, 427,811.49 and 85,589.73

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Solution

The fourth proportional to 285,224.76, 427,811.49 and 85,589.73 is: 128,376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,224.76 : 427,811.49 = 85,589.73 : x
  2. Step 2: Convert to fraction form
    285,224.76/427,811.49 = 85,589.73/x
  3. Step 3: Cross multiply
    285,224.76x = 427,811.49 × 85,589.73
  4. Step 4: Simplify right side
    285,224.76x = 36,616,269,920.00
  5. Step 5: Solve for x
    x = 36,616,269,920.00/285,224.76
  6. Step 6: Final answer
    x = 128,376.90

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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.