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Finding the Fourth Proportional to 656.78, 984.89 and 245.63

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Solution

The fourth proportional to 656.78, 984.89 and 245.63 is: 368.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.78 : 984.89 = 245.63 : x
  2. Step 2: Convert to fraction form
    656.78/984.89 = 245.63/x
  3. Step 3: Cross multiply
    656.78x = 984.89 × 245.63
  4. Step 4: Simplify right side
    656.78x = 241,921.61
  5. Step 5: Solve for x
    x = 241,921.61/656.78
  6. Step 6: Final answer
    x = 368.34

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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.