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Finding the Fourth Proportional to 633.56, 949.08 and 390.56

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Solution

The fourth proportional to 633.56, 949.08 and 390.56 is: 585.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.56 : 949.08 = 390.56 : x
  2. Step 2: Convert to fraction form
    633.56/949.08 = 390.56/x
  3. Step 3: Cross multiply
    633.56x = 949.08 × 390.56
  4. Step 4: Simplify right side
    633.56x = 370,672.68
  5. Step 5: Solve for x
    x = 370,672.68/633.56
  6. Step 6: Final answer
    x = 585.06

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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.