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Finding the Fourth Proportional to 303,419.40, 455,129.10 and 154,120.20

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Solution

The fourth proportional to 303,419.40, 455,129.10 and 154,120.20 is: 231,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,419.40 : 455,129.10 = 154,120.20 : x
  2. Step 2: Convert to fraction form
    303,419.40/455,129.10 = 154,120.20/x
  3. Step 3: Cross multiply
    303,419.40x = 455,129.10 × 154,120.20
  4. Step 4: Simplify right side
    303,419.40x = 70,144,587,917.82
  5. Step 5: Solve for x
    x = 70,144,587,917.82/303,419.40
  6. Step 6: Final answer
    x = 231,180.30

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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.