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Finding the Fourth Proportional to 403.30, 602.65 and 338.50

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Solution

The fourth proportional to 403.30, 602.65 and 338.50 is: 505.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.30 : 602.65 = 338.50 : x
  2. Step 2: Convert to fraction form
    403.30/602.65 = 338.50/x
  3. Step 3: Cross multiply
    403.30x = 602.65 × 338.50
  4. Step 4: Simplify right side
    403.30x = 203,997.03
  5. Step 5: Solve for x
    x = 203,997.03/403.30
  6. Step 6: Final answer
    x = 505.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.