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Finding the Fourth Proportional to 427,965.20, 641,656.20 and 203,433.20

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Solution

The fourth proportional to 427,965.20, 641,656.20 and 203,433.20 is: 305,011.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,965.20 : 641,656.20 = 203,433.20 : x
  2. Step 2: Convert to fraction form
    427,965.20/641,656.20 = 203,433.20/x
  3. Step 3: Cross multiply
    427,965.20x = 641,656.20 × 203,433.20
  4. Step 4: Simplify right side
    427,965.20x = 130,534,174,065.84
  5. Step 5: Solve for x
    x = 130,534,174,065.84/427,965.20
  6. Step 6: Final answer
    x = 305,011.19

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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.