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Finding the Fourth Proportional to 253,260.51, 379,891.40 and 103,500.78

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Solution

The fourth proportional to 253,260.51, 379,891.40 and 103,500.78 is: 155,251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,260.51 : 379,891.40 = 103,500.78 : x
  2. Step 2: Convert to fraction form
    253,260.51/379,891.40 = 103,500.78/x
  3. Step 3: Cross multiply
    253,260.51x = 379,891.40 × 103,500.78
  4. Step 4: Simplify right side
    253,260.51x = 39,319,056,215.29
  5. Step 5: Solve for x
    x = 39,319,056,215.29/253,260.51
  6. Step 6: Final answer
    x = 155,251.43

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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.