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Finding the Fourth Proportional to 1,490.70, 2,236.07 and 450.72

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Solution

The fourth proportional to 1,490.70, 2,236.07 and 450.72 is: 676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.70 : 2,236.07 = 450.72 : x
  2. Step 2: Convert to fraction form
    1,490.70/2,236.07 = 450.72/x
  3. Step 3: Cross multiply
    1,490.70x = 2,236.07 × 450.72
  4. Step 4: Simplify right side
    1,490.70x = 1,007,841.47
  5. Step 5: Solve for x
    x = 1,007,841.47/1,490.70
  6. Step 6: Final answer
    x = 676.09

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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.