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Finding the Fourth Proportional to 253,148.40, 379,722.96 and 103,388.72

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Solution

The fourth proportional to 253,148.40, 379,722.96 and 103,388.72 is: 155,083.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,148.40 : 379,722.96 = 103,388.72 : x
  2. Step 2: Convert to fraction form
    253,148.40/379,722.96 = 103,388.72/x
  3. Step 3: Cross multiply
    253,148.40x = 379,722.96 × 103,388.72
  4. Step 4: Simplify right side
    253,148.40x = 39,259,068,890.40
  5. Step 5: Solve for x
    x = 39,259,068,890.40/253,148.40
  6. Step 6: Final answer
    x = 155,083.22

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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.