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Finding the Fourth Proportional to 1,225.34, 1,837.32 and 403.55

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Solution

The fourth proportional to 1,225.34, 1,837.32 and 403.55 is: 605.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.34 : 1,837.32 = 403.55 : x
  2. Step 2: Convert to fraction form
    1,225.34/1,837.32 = 403.55/x
  3. Step 3: Cross multiply
    1,225.34x = 1,837.32 × 403.55
  4. Step 4: Simplify right side
    1,225.34x = 741,441.30
  5. Step 5: Solve for x
    x = 741,441.30/1,225.34
  6. Step 6: Final answer
    x = 605.09

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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.