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Finding the Fourth Proportional to 3,873.42, 5,809.32 and 1,275.75

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Solution

The fourth proportional to 3,873.42, 5,809.32 and 1,275.75 is: 1,913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.42 : 5,809.32 = 1,275.75 : x
  2. Step 2: Convert to fraction form
    3,873.42/5,809.32 = 1,275.75/x
  3. Step 3: Cross multiply
    3,873.42x = 5,809.32 × 1,275.75
  4. Step 4: Simplify right side
    3,873.42x = 7,411,239.99
  5. Step 5: Solve for x
    x = 7,411,239.99/3,873.42
  6. Step 6: Final answer
    x = 1,913.36

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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.