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Finding the Fourth Proportional to 320,446.58, 480,697.31 and 83,788.88

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Solution

The fourth proportional to 320,446.58, 480,697.31 and 83,788.88 is: 125,690.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,446.58 : 480,697.31 = 83,788.88 : x
  2. Step 2: Convert to fraction form
    320,446.58/480,697.31 = 83,788.88/x
  3. Step 3: Cross multiply
    320,446.58x = 480,697.31 × 83,788.88
  4. Step 4: Simplify right side
    320,446.58x = 40,277,087,029.90
  5. Step 5: Solve for x
    x = 40,277,087,029.90/320,446.58
  6. Step 6: Final answer
    x = 125,690.49

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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.