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Finding the Fourth Proportional to 258,609.79, 387,910.80 and 116,354.62

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Solution

The fourth proportional to 258,609.79, 387,910.80 and 116,354.62 is: 174,530.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,609.79 : 387,910.80 = 116,354.62 : x
  2. Step 2: Convert to fraction form
    258,609.79/387,910.80 = 116,354.62/x
  3. Step 3: Cross multiply
    258,609.79x = 387,910.80 × 116,354.62
  4. Step 4: Simplify right side
    258,609.79x = 45,135,213,727.90
  5. Step 5: Solve for x
    x = 45,135,213,727.90/258,609.79
  6. Step 6: Final answer
    x = 174,530.18

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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.