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Finding the Fourth Proportional to 1,343.89, 2,015.74 and 369.91

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Solution

The fourth proportional to 1,343.89, 2,015.74 and 369.91 is: 554.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.89 : 2,015.74 = 369.91 : x
  2. Step 2: Convert to fraction form
    1,343.89/2,015.74 = 369.91/x
  3. Step 3: Cross multiply
    1,343.89x = 2,015.74 × 369.91
  4. Step 4: Simplify right side
    1,343.89x = 745,642.38
  5. Step 5: Solve for x
    x = 745,642.38/1,343.89
  6. Step 6: Final answer
    x = 554.84

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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.