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Finding the Fourth Proportional to 258,276.60, 387,353.22 and 108,519.72

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Solution

The fourth proportional to 258,276.60, 387,353.22 and 108,519.72 is: 162,753.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,276.60 : 387,353.22 = 108,519.72 : x
  2. Step 2: Convert to fraction form
    258,276.60/387,353.22 = 108,519.72/x
  3. Step 3: Cross multiply
    258,276.60x = 387,353.22 × 108,519.72
  4. Step 4: Simplify right side
    258,276.60x = 42,035,462,975.50
  5. Step 5: Solve for x
    x = 42,035,462,975.50/258,276.60
  6. Step 6: Final answer
    x = 162,753.66

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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.