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Finding the Fourth Proportional to 654.55, 987.65 and 629.24

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Solution

The fourth proportional to 654.55, 987.65 and 629.24 is: 949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.55 : 987.65 = 629.24 : x
  2. Step 2: Convert to fraction form
    654.55/987.65 = 629.24/x
  3. Step 3: Cross multiply
    654.55x = 987.65 × 629.24
  4. Step 4: Simplify right side
    654.55x = 621,468.89
  5. Step 5: Solve for x
    x = 621,468.89/654.55
  6. Step 6: Final answer
    x = 949.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.