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Finding the Fourth Proportional to 4,245.40, 5,857.04 and 3,129

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Solution

The fourth proportional to 4,245.40, 5,857.04 and 3,129 is: 4,316.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,245.40 : 5,857.04 = 3,129 : x
  2. Step 2: Convert to fraction form
    4,245.40/5,857.04 = 3,129/x
  3. Step 3: Cross multiply
    4,245.40x = 5,857.04 × 3,129
  4. Step 4: Simplify right side
    4,245.40x = 18,326,678.16
  5. Step 5: Solve for x
    x = 18,326,678.16/4,245.40
  6. Step 6: Final answer
    x = 4,316.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.