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Finding the Fourth Proportional to 345,905.70, 518,570.55 and 146,379.30

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Solution

The fourth proportional to 345,905.70, 518,570.55 and 146,379.30 is: 219,447.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,905.70 : 518,570.55 = 146,379.30 : x
  2. Step 2: Convert to fraction form
    345,905.70/518,570.55 = 146,379.30/x
  3. Step 3: Cross multiply
    345,905.70x = 518,570.55 × 146,379.30
  4. Step 4: Simplify right side
    345,905.70x = 75,907,994,109.62
  5. Step 5: Solve for x
    x = 75,907,994,109.62/345,905.70
  6. Step 6: Final answer
    x = 219,447.08

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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.