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Finding the Fourth Proportional to 391,725.80, 587,673.30 and 121,848.81

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Solution

The fourth proportional to 391,725.80, 587,673.30 and 121,848.81 is: 182,799.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,725.80 : 587,673.30 = 121,848.81 : x
  2. Step 2: Convert to fraction form
    391,725.80/587,673.30 = 121,848.81/x
  3. Step 3: Cross multiply
    391,725.80x = 587,673.30 × 121,848.81
  4. Step 4: Simplify right side
    391,725.80x = 71,607,292,273.77
  5. Step 5: Solve for x
    x = 71,607,292,273.77/391,725.80
  6. Step 6: Final answer
    x = 182,799.53

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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.