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Finding the Fourth Proportional to 320,404.50, 480,639.65 and 120,892.79

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Solution

The fourth proportional to 320,404.50, 480,639.65 and 120,892.79 is: 181,351.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,404.50 : 480,639.65 = 120,892.79 : x
  2. Step 2: Convert to fraction form
    320,404.50/480,639.65 = 120,892.79/x
  3. Step 3: Cross multiply
    320,404.50x = 480,639.65 × 120,892.79
  4. Step 4: Simplify right side
    320,404.50x = 58,105,865,265.46
  5. Step 5: Solve for x
    x = 58,105,865,265.46/320,404.50
  6. Step 6: Final answer
    x = 181,351.59

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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.