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Finding the Fourth Proportional to 442,668.21, 663,818.98 and 138,960.89

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Solution

The fourth proportional to 442,668.21, 663,818.98 and 138,960.89 is: 208,383.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,668.21 : 663,818.98 = 138,960.89 : x
  2. Step 2: Convert to fraction form
    442,668.21/663,818.98 = 138,960.89/x
  3. Step 3: Cross multiply
    442,668.21x = 663,818.98 × 138,960.89
  4. Step 4: Simplify right side
    442,668.21x = 92,244,872,245.79
  5. Step 5: Solve for x
    x = 92,244,872,245.79/442,668.21
  6. Step 6: Final answer
    x = 208,383.77

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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.