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Finding the Fourth Proportional to 345,981.60, 518,893.92 and 158,813.28

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Solution

The fourth proportional to 345,981.60, 518,893.92 and 158,813.28 is: 238,183.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,981.60 : 518,893.92 = 158,813.28 : x
  2. Step 2: Convert to fraction form
    345,981.60/518,893.92 = 158,813.28/x
  3. Step 3: Cross multiply
    345,981.60x = 518,893.92 × 158,813.28
  4. Step 4: Simplify right side
    345,981.60x = 82,407,245,407.26
  5. Step 5: Solve for x
    x = 82,407,245,407.26/345,981.60
  6. Step 6: Final answer
    x = 238,183.90

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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.