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Finding the Fourth Proportional to 737.72, 1,018.16 and 438.92

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Solution

The fourth proportional to 737.72, 1,018.16 and 438.92 is: 605.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.72 : 1,018.16 = 438.92 : x
  2. Step 2: Convert to fraction form
    737.72/1,018.16 = 438.92/x
  3. Step 3: Cross multiply
    737.72x = 1,018.16 × 438.92
  4. Step 4: Simplify right side
    737.72x = 446,890.79
  5. Step 5: Solve for x
    x = 446,890.79/737.72
  6. Step 6: Final answer
    x = 605.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.