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Finding the Fourth Proportional to 303,425.40, 455,138.10 and 154,126.20

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Solution

The fourth proportional to 303,425.40, 455,138.10 and 154,126.20 is: 231,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,425.40 : 455,138.10 = 154,126.20 : x
  2. Step 2: Convert to fraction form
    303,425.40/455,138.10 = 154,126.20/x
  3. Step 3: Cross multiply
    303,425.40x = 455,138.10 × 154,126.20
  4. Step 4: Simplify right side
    303,425.40x = 70,148,705,828.22
  5. Step 5: Solve for x
    x = 70,148,705,828.22/303,425.40
  6. Step 6: Final answer
    x = 231,189.30

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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.