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Finding the Fourth Proportional to 3,438.42, 5,157.58 and 841.38

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Solution

The fourth proportional to 3,438.42, 5,157.58 and 841.38 is: 1,262.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.42 : 5,157.58 = 841.38 : x
  2. Step 2: Convert to fraction form
    3,438.42/5,157.58 = 841.38/x
  3. Step 3: Cross multiply
    3,438.42x = 5,157.58 × 841.38
  4. Step 4: Simplify right side
    3,438.42x = 4,339,484.66
  5. Step 5: Solve for x
    x = 4,339,484.66/3,438.42
  6. Step 6: Final answer
    x = 1,262.06

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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.