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Finding the Fourth Proportional to 3,953.99, 5,918.11 and 2,913.58

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Solution

The fourth proportional to 3,953.99, 5,918.11 and 2,913.58 is: 4,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.99 : 5,918.11 = 2,913.58 : x
  2. Step 2: Convert to fraction form
    3,953.99/5,918.11 = 2,913.58/x
  3. Step 3: Cross multiply
    3,953.99x = 5,918.11 × 2,913.58
  4. Step 4: Simplify right side
    3,953.99x = 17,242,886.93
  5. Step 5: Solve for x
    x = 17,242,886.93/3,953.99
  6. Step 6: Final answer
    x = 4,360.88

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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.