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Finding the Fourth Proportional to 626.12, 863.29 and 404.99

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Solution

The fourth proportional to 626.12, 863.29 and 404.99 is: 558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 863.29 = 404.99 : x
  2. Step 2: Convert to fraction form
    626.12/863.29 = 404.99/x
  3. Step 3: Cross multiply
    626.12x = 863.29 × 404.99
  4. Step 4: Simplify right side
    626.12x = 349,623.82
  5. Step 5: Solve for x
    x = 349,623.82/626.12
  6. Step 6: Final answer
    x = 558.40

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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.