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Finding the Fourth Proportional to 422,325.53, 633,537.51 and 138,037.40

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Solution

The fourth proportional to 422,325.53, 633,537.51 and 138,037.40 is: 207,072.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,325.53 : 633,537.51 = 138,037.40 : x
  2. Step 2: Convert to fraction form
    422,325.53/633,537.51 = 138,037.40/x
  3. Step 3: Cross multiply
    422,325.53x = 633,537.51 × 138,037.40
  4. Step 4: Simplify right side
    422,325.53x = 87,451,870,682.87
  5. Step 5: Solve for x
    x = 87,451,870,682.87/422,325.53
  6. Step 6: Final answer
    x = 207,072.19

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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.