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Finding the Fourth Proportional to 985.02, 1,477.56 and 254.64

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Solution

The fourth proportional to 985.02, 1,477.56 and 254.64 is: 381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.02 : 1,477.56 = 254.64 : x
  2. Step 2: Convert to fraction form
    985.02/1,477.56 = 254.64/x
  3. Step 3: Cross multiply
    985.02x = 1,477.56 × 254.64
  4. Step 4: Simplify right side
    985.02x = 376,245.88
  5. Step 5: Solve for x
    x = 376,245.88/985.02
  6. Step 6: Final answer
    x = 381.97

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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.