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Finding the Fourth Proportional to 220,693.20, 331,212.60 and 102,379.20

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Solution

The fourth proportional to 220,693.20, 331,212.60 and 102,379.20 is: 153,648.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,693.20 : 331,212.60 = 102,379.20 : x
  2. Step 2: Convert to fraction form
    220,693.20/331,212.60 = 102,379.20/x
  3. Step 3: Cross multiply
    220,693.20x = 331,212.60 × 102,379.20
  4. Step 4: Simplify right side
    220,693.20x = 33,909,281,017.92
  5. Step 5: Solve for x
    x = 33,909,281,017.92/220,693.20
  6. Step 6: Final answer
    x = 153,648.96

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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.