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Finding the Fourth Proportional to 1,235.72, 1,853.16 and 369.92

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Solution

The fourth proportional to 1,235.72, 1,853.16 and 369.92 is: 554.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.72 : 1,853.16 = 369.92 : x
  2. Step 2: Convert to fraction form
    1,235.72/1,853.16 = 369.92/x
  3. Step 3: Cross multiply
    1,235.72x = 1,853.16 × 369.92
  4. Step 4: Simplify right side
    1,235.72x = 685,520.95
  5. Step 5: Solve for x
    x = 685,520.95/1,235.72
  6. Step 6: Final answer
    x = 554.75

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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.