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Finding the Fourth Proportional to 285,286.95, 427,930.02 and 85,607.01

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Solution

The fourth proportional to 285,286.95, 427,930.02 and 85,607.01 is: 128,410.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,286.95 : 427,930.02 = 85,607.01 : x
  2. Step 2: Convert to fraction form
    285,286.95/427,930.02 = 85,607.01/x
  3. Step 3: Cross multiply
    285,286.95x = 427,930.02 × 85,607.01
  4. Step 4: Simplify right side
    285,286.95x = 36,633,809,501.44
  5. Step 5: Solve for x
    x = 36,633,809,501.44/285,286.95
  6. Step 6: Final answer
    x = 128,410.39

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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.