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Finding the Fourth Proportional to 656.37, 983.88 and 412.56

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Solution

The fourth proportional to 656.37, 983.88 and 412.56 is: 618.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.37 : 983.88 = 412.56 : x
  2. Step 2: Convert to fraction form
    656.37/983.88 = 412.56/x
  3. Step 3: Cross multiply
    656.37x = 983.88 × 412.56
  4. Step 4: Simplify right side
    656.37x = 405,909.53
  5. Step 5: Solve for x
    x = 405,909.53/656.37
  6. Step 6: Final answer
    x = 618.42

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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.