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Finding the Fourth Proportional to 318,969.60, 478,519.20 and 108,628.80

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Solution

The fourth proportional to 318,969.60, 478,519.20 and 108,628.80 is: 162,965.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,969.60 : 478,519.20 = 108,628.80 : x
  2. Step 2: Convert to fraction form
    318,969.60/478,519.20 = 108,628.80/x
  3. Step 3: Cross multiply
    318,969.60x = 478,519.20 × 108,628.80
  4. Step 4: Simplify right side
    318,969.60x = 51,980,966,472.96
  5. Step 5: Solve for x
    x = 51,980,966,472.96/318,969.60
  6. Step 6: Final answer
    x = 162,965.27

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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.