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Finding the Fourth Proportional to 320,431.08, 480,673.89 and 83,773.38

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Solution

The fourth proportional to 320,431.08, 480,673.89 and 83,773.38 is: 125,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,431.08 : 480,673.89 = 83,773.38 : x
  2. Step 2: Convert to fraction form
    320,431.08/480,673.89 = 83,773.38/x
  3. Step 3: Cross multiply
    320,431.08x = 480,673.89 × 83,773.38
  4. Step 4: Simplify right side
    320,431.08x = 40,267,676,443.05
  5. Step 5: Solve for x
    x = 40,267,676,443.05/320,431.08
  6. Step 6: Final answer
    x = 125,667.20

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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.