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Finding the Fourth Proportional to 253,639.37, 380,447.20 and 103,842.63

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Solution

The fourth proportional to 253,639.37, 380,447.20 and 103,842.63 is: 155,759.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,639.37 : 380,447.20 = 103,842.63 : x
  2. Step 2: Convert to fraction form
    253,639.37/380,447.20 = 103,842.63/x
  3. Step 3: Cross multiply
    253,639.37x = 380,447.20 × 103,842.63
  4. Step 4: Simplify right side
    253,639.37x = 39,506,635,921.90
  5. Step 5: Solve for x
    x = 39,506,635,921.90/253,639.37
  6. Step 6: Final answer
    x = 155,759.09

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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.