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Finding the Fourth Proportional to 220,840.40, 331,260.60 and 154,139.60

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Solution

The fourth proportional to 220,840.40, 331,260.60 and 154,139.60 is: 231,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,840.40 : 331,260.60 = 154,139.60 : x
  2. Step 2: Convert to fraction form
    220,840.40/331,260.60 = 154,139.60/x
  3. Step 3: Cross multiply
    220,840.40x = 331,260.60 × 154,139.60
  4. Step 4: Simplify right side
    220,840.40x = 51,060,376,379.76
  5. Step 5: Solve for x
    x = 51,060,376,379.76/220,840.40
  6. Step 6: Final answer
    x = 231,209.40

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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.