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Finding the Fourth Proportional to 1,231.09, 1,846.43 and 353.70

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Solution

The fourth proportional to 1,231.09, 1,846.43 and 353.70 is: 530.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.09 : 1,846.43 = 353.70 : x
  2. Step 2: Convert to fraction form
    1,231.09/1,846.43 = 353.70/x
  3. Step 3: Cross multiply
    1,231.09x = 1,846.43 × 353.70
  4. Step 4: Simplify right side
    1,231.09x = 653,082.29
  5. Step 5: Solve for x
    x = 653,082.29/1,231.09
  6. Step 6: Final answer
    x = 530.49

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Double scale
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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.