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Finding the Fourth Proportional to 1,408,736.46, 1,941,899.28 and 863,861.88

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Solution

The fourth proportional to 1,408,736.46, 1,941,899.28 and 863,861.88 is: 1,190,806.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408,736.46 : 1,941,899.28 = 863,861.88 : x
  2. Step 2: Convert to fraction form
    1,408,736.46/1,941,899.28 = 863,861.88/x
  3. Step 3: Cross multiply
    1,408,736.46x = 1,941,899.28 × 863,861.88
  4. Step 4: Simplify right side
    1,408,736.46x = 1,677,532,762,791.45
  5. Step 5: Solve for x
    x = 1,677,532,762,791.45/1,408,736.46
  6. Step 6: Final answer
    x = 1,190,806.66

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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.