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Finding the Fourth Proportional to 391,653.63, 587,385.07 and 163,826.09

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Solution

The fourth proportional to 391,653.63, 587,385.07 and 163,826.09 is: 245,699.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,653.63 : 587,385.07 = 163,826.09 : x
  2. Step 2: Convert to fraction form
    391,653.63/587,385.07 = 163,826.09/x
  3. Step 3: Cross multiply
    391,653.63x = 587,385.07 × 163,826.09
  4. Step 4: Simplify right side
    391,653.63x = 96,229,001,502.72
  5. Step 5: Solve for x
    x = 96,229,001,502.72/391,653.63
  6. Step 6: Final answer
    x = 245,699.25

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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.