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Finding the Fourth Proportional to 499.63, 745.59 and 438.89

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Solution

The fourth proportional to 499.63, 745.59 and 438.89 is: 654.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.63 : 745.59 = 438.89 : x
  2. Step 2: Convert to fraction form
    499.63/745.59 = 438.89/x
  3. Step 3: Cross multiply
    499.63x = 745.59 × 438.89
  4. Step 4: Simplify right side
    499.63x = 327,230.87
  5. Step 5: Solve for x
    x = 327,230.87/499.63
  6. Step 6: Final answer
    x = 654.95

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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.