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Finding the Fourth Proportional to 614.77, 922.14 and 438.31

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Solution

The fourth proportional to 614.77, 922.14 and 438.31 is: 657.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.77 : 922.14 = 438.31 : x
  2. Step 2: Convert to fraction form
    614.77/922.14 = 438.31/x
  3. Step 3: Cross multiply
    614.77x = 922.14 × 438.31
  4. Step 4: Simplify right side
    614.77x = 404,183.18
  5. Step 5: Solve for x
    x = 404,183.18/614.77
  6. Step 6: Final answer
    x = 657.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.