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Finding the Fourth Proportional to 318,996.54, 478,568.88 and 108,636.30

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Solution

The fourth proportional to 318,996.54, 478,568.88 and 108,636.30 is: 162,979.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,996.54 : 478,568.88 = 108,636.30 : x
  2. Step 2: Convert to fraction form
    318,996.54/478,568.88 = 108,636.30/x
  3. Step 3: Cross multiply
    318,996.54x = 478,568.88 × 108,636.30
  4. Step 4: Simplify right side
    318,996.54x = 51,989,952,418.34
  5. Step 5: Solve for x
    x = 51,989,952,418.34/318,996.54
  6. Step 6: Final answer
    x = 162,979.68

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1.5x scale

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.