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Finding the Fourth Proportional to 621.51, 863.63 and 614.76

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Solution

The fourth proportional to 621.51, 863.63 and 614.76 is: 854.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.51 : 863.63 = 614.76 : x
  2. Step 2: Convert to fraction form
    621.51/863.63 = 614.76/x
  3. Step 3: Cross multiply
    621.51x = 863.63 × 614.76
  4. Step 4: Simplify right side
    621.51x = 530,922.11
  5. Step 5: Solve for x
    x = 530,922.11/621.51
  6. Step 6: Final answer
    x = 854.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.