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Finding the Fourth Proportional to 553,857.56, 764,328.20 and 312,093.80

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Solution

The fourth proportional to 553,857.56, 764,328.20 and 312,093.80 is: 430,692.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,857.56 : 764,328.20 = 312,093.80 : x
  2. Step 2: Convert to fraction form
    553,857.56/764,328.20 = 312,093.80/x
  3. Step 3: Cross multiply
    553,857.56x = 764,328.20 × 312,093.80
  4. Step 4: Simplify right side
    553,857.56x = 238,542,087,003.05
  5. Step 5: Solve for x
    x = 238,542,087,003.05/553,857.56
  6. Step 6: Final answer
    x = 430,692.12

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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.