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Finding the Fourth Proportional to 422,637.60, 583,238.66 and 231,650.40

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Solution

The fourth proportional to 422,637.60, 583,238.66 and 231,650.40 is: 319,676.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,637.60 : 583,238.66 = 231,650.40 : x
  2. Step 2: Convert to fraction form
    422,637.60/583,238.66 = 231,650.40/x
  3. Step 3: Cross multiply
    422,637.60x = 583,238.66 × 231,650.40
  4. Step 4: Simplify right side
    422,637.60x = 135,107,468,884.46
  5. Step 5: Solve for x
    x = 135,107,468,884.46/422,637.60
  6. Step 6: Final answer
    x = 319,676.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.