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Finding the Fourth Proportional to 438.53, 654.63 and 373.09

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Solution

The fourth proportional to 438.53, 654.63 and 373.09 is: 556.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.53 : 654.63 = 373.09 : x
  2. Step 2: Convert to fraction form
    438.53/654.63 = 373.09/x
  3. Step 3: Cross multiply
    438.53x = 654.63 × 373.09
  4. Step 4: Simplify right side
    438.53x = 244,230.77
  5. Step 5: Solve for x
    x = 244,230.77/438.53
  6. Step 6: Final answer
    x = 556.94

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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.