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Finding the Fourth Proportional to 449,189.55, 620,133.84 and 311,568.93

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Solution

The fourth proportional to 449,189.55, 620,133.84 and 311,568.93 is: 430,140.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,189.55 : 620,133.84 = 311,568.93 : x
  2. Step 2: Convert to fraction form
    449,189.55/620,133.84 = 311,568.93/x
  3. Step 3: Cross multiply
    449,189.55x = 620,133.84 × 311,568.93
  4. Step 4: Simplify right side
    449,189.55x = 193,214,436,985.59
  5. Step 5: Solve for x
    x = 193,214,436,985.59/449,189.55
  6. Step 6: Final answer
    x = 430,140.10

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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.