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Finding the Fourth Proportional to 5,784, 7,988.44 and 3,917.76

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Solution

The fourth proportional to 5,784, 7,988.44 and 3,917.76 is: 5,410.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,784 : 7,988.44 = 3,917.76 : x
  2. Step 2: Convert to fraction form
    5,784/7,988.44 = 3,917.76/x
  3. Step 3: Cross multiply
    5,784x = 7,988.44 × 3,917.76
  4. Step 4: Simplify right side
    5,784x = 31,296,790.69
  5. Step 5: Solve for x
    x = 31,296,790.69/5,784
  6. Step 6: Final answer
    x = 5,410.93

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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.