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Finding the Fourth Proportional to 318,992.80, 478,489.20 and 186,023.20

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Solution

The fourth proportional to 318,992.80, 478,489.20 and 186,023.20 is: 279,034.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,992.80 : 478,489.20 = 186,023.20 : x
  2. Step 2: Convert to fraction form
    318,992.80/478,489.20 = 186,023.20/x
  3. Step 3: Cross multiply
    318,992.80x = 478,489.20 × 186,023.20
  4. Step 4: Simplify right side
    318,992.80x = 89,010,092,149.44
  5. Step 5: Solve for x
    x = 89,010,092,149.44/318,992.80
  6. Step 6: Final answer
    x = 279,034.80

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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.