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Finding the Fourth Proportional to 2,235.60, 3,353.40 and 936.72

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Solution

The fourth proportional to 2,235.60, 3,353.40 and 936.72 is: 1,405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,235.60 : 3,353.40 = 936.72 : x
  2. Step 2: Convert to fraction form
    2,235.60/3,353.40 = 936.72/x
  3. Step 3: Cross multiply
    2,235.60x = 3,353.40 × 936.72
  4. Step 4: Simplify right side
    2,235.60x = 3,141,196.85
  5. Step 5: Solve for x
    x = 3,141,196.85/2,235.60
  6. Step 6: Final answer
    x = 1,405.08

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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.