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Finding the Fourth Proportional to 481,349.28, 664,271.64 and 287,956.44

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Solution

The fourth proportional to 481,349.28, 664,271.64 and 287,956.44 is: 397,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,349.28 : 664,271.64 = 287,956.44 : x
  2. Step 2: Convert to fraction form
    481,349.28/664,271.64 = 287,956.44/x
  3. Step 3: Cross multiply
    481,349.28x = 664,271.64 × 287,956.44
  4. Step 4: Simplify right side
    481,349.28x = 191,281,296,647.36
  5. Step 5: Solve for x
    x = 191,281,296,647.36/481,349.28
  6. Step 6: Final answer
    x = 397,385.65

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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.