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Finding the Fourth Proportional to 5,276.64, 7,917.72 and 2,158.96

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Solution

The fourth proportional to 5,276.64, 7,917.72 and 2,158.96 is: 3,239.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,276.64 : 7,917.72 = 2,158.96 : x
  2. Step 2: Convert to fraction form
    5,276.64/7,917.72 = 2,158.96/x
  3. Step 3: Cross multiply
    5,276.64x = 7,917.72 × 2,158.96
  4. Step 4: Simplify right side
    5,276.64x = 17,094,040.77
  5. Step 5: Solve for x
    x = 17,094,040.77/5,276.64
  6. Step 6: Final answer
    x = 3,239.57

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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.