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Finding the Fourth Proportional to 391,784.51, 587,630.60 and 107,503.81

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Solution

The fourth proportional to 391,784.51, 587,630.60 and 107,503.81 is: 161,243.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,784.51 : 587,630.60 = 107,503.81 : x
  2. Step 2: Convert to fraction form
    391,784.51/587,630.60 = 107,503.81/x
  3. Step 3: Cross multiply
    391,784.51x = 587,630.60 × 107,503.81
  4. Step 4: Simplify right side
    391,784.51x = 63,172,526,769.13
  5. Step 5: Solve for x
    x = 63,172,526,769.13/391,784.51
  6. Step 6: Final answer
    x = 161,243.04

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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.