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Finding the Fourth Proportional to 618.16, 854.24 and 488.20

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Solution

The fourth proportional to 618.16, 854.24 and 488.20 is: 674.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.16 : 854.24 = 488.20 : x
  2. Step 2: Convert to fraction form
    618.16/854.24 = 488.20/x
  3. Step 3: Cross multiply
    618.16x = 854.24 × 488.20
  4. Step 4: Simplify right side
    618.16x = 417,039.97
  5. Step 5: Solve for x
    x = 417,039.97/618.16
  6. Step 6: Final answer
    x = 674.65

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