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Finding the Fourth Proportional to 438.66, 654.18 and 403.22

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Solution

The fourth proportional to 438.66, 654.18 and 403.22 is: 601.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.66 : 654.18 = 403.22 : x
  2. Step 2: Convert to fraction form
    438.66/654.18 = 403.22/x
  3. Step 3: Cross multiply
    438.66x = 654.18 × 403.22
  4. Step 4: Simplify right side
    438.66x = 263,775.19
  5. Step 5: Solve for x
    x = 263,775.19/438.66
  6. Step 6: Final answer
    x = 601.32

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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.