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Finding the Fourth Proportional to 425,286.56, 637,994.52 and 144,738.20

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Solution

The fourth proportional to 425,286.56, 637,994.52 and 144,738.20 is: 217,129.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,286.56 : 637,994.52 = 144,738.20 : x
  2. Step 2: Convert to fraction form
    425,286.56/637,994.52 = 144,738.20/x
  3. Step 3: Cross multiply
    425,286.56x = 637,994.52 × 144,738.20
  4. Step 4: Simplify right side
    425,286.56x = 92,342,178,434.66
  5. Step 5: Solve for x
    x = 92,342,178,434.66/425,286.56
  6. Step 6: Final answer
    x = 217,129.31

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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.