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Finding the Fourth Proportional to 391,860.54, 540,773.72 and 219,816.75

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Solution

The fourth proportional to 391,860.54, 540,773.72 and 219,816.75 is: 303,350.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,860.54 : 540,773.72 = 219,816.75 : x
  2. Step 2: Convert to fraction form
    391,860.54/540,773.72 = 219,816.75/x
  3. Step 3: Cross multiply
    391,860.54x = 540,773.72 × 219,816.75
  4. Step 4: Simplify right side
    391,860.54x = 118,871,121,615.81
  5. Step 5: Solve for x
    x = 118,871,121,615.81/391,860.54
  6. Step 6: Final answer
    x = 303,350.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.