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Finding the Fourth Proportional to 345,717.72, 518,532.84 and 135,503.28

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Solution

The fourth proportional to 345,717.72, 518,532.84 and 135,503.28 is: 203,237.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,717.72 : 518,532.84 = 135,503.28 : x
  2. Step 2: Convert to fraction form
    345,717.72/518,532.84 = 135,503.28/x
  3. Step 3: Cross multiply
    345,717.72x = 518,532.84 × 135,503.28
  4. Step 4: Simplify right side
    345,717.72x = 70,262,900,607.72
  5. Step 5: Solve for x
    x = 70,262,900,607.72/345,717.72
  6. Step 6: Final answer
    x = 203,237.78

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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.