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Finding the Fourth Proportional to 318,644.73, 439,739.64 and 173,460.18

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Solution

The fourth proportional to 318,644.73, 439,739.64 and 173,460.18 is: 239,380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,644.73 : 439,739.64 = 173,460.18 : x
  2. Step 2: Convert to fraction form
    318,644.73/439,739.64 = 173,460.18/x
  3. Step 3: Cross multiply
    318,644.73x = 439,739.64 × 173,460.18
  4. Step 4: Simplify right side
    318,644.73x = 76,277,317,107.54
  5. Step 5: Solve for x
    x = 76,277,317,107.54/318,644.73
  6. Step 6: Final answer
    x = 239,380.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.