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Finding the Fourth Proportional to 391,511.04, 587,188.80 and 191,745.60

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Solution

The fourth proportional to 391,511.04, 587,188.80 and 191,745.60 is: 287,580.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,511.04 : 587,188.80 = 191,745.60 : x
  2. Step 2: Convert to fraction form
    391,511.04/587,188.80 = 191,745.60/x
  3. Step 3: Cross multiply
    391,511.04x = 587,188.80 × 191,745.60
  4. Step 4: Simplify right side
    391,511.04x = 112,590,868,769.28
  5. Step 5: Solve for x
    x = 112,590,868,769.28/391,511.04
  6. Step 6: Final answer
    x = 287,580.32

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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.