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Finding the Fourth Proportional to 391,645.51, 587,473.39 and 125,406

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Solution

The fourth proportional to 391,645.51, 587,473.39 and 125,406 is: 188,110.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,645.51 : 587,473.39 = 125,406 : x
  2. Step 2: Convert to fraction form
    391,645.51/587,473.39 = 125,406/x
  3. Step 3: Cross multiply
    391,645.51x = 587,473.39 × 125,406
  4. Step 4: Simplify right side
    391,645.51x = 73,672,687,946.34
  5. Step 5: Solve for x
    x = 73,672,687,946.34/391,645.51
  6. Step 6: Final answer
    x = 188,110.64

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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.