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Finding the Fourth Proportional to 391,861.04, 540,774.41 and 219,817.25

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Solution

The fourth proportional to 391,861.04, 540,774.41 and 219,817.25 is: 303,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,861.04 : 540,774.41 = 219,817.25 : x
  2. Step 2: Convert to fraction form
    391,861.04/540,774.41 = 219,817.25/x
  3. Step 3: Cross multiply
    391,861.04x = 540,774.41 × 219,817.25
  4. Step 4: Simplify right side
    391,861.04x = 118,871,539,873.61
  5. Step 5: Solve for x
    x = 118,871,539,873.61/391,861.04
  6. Step 6: Final answer
    x = 303,351.26

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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.