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Finding the Fourth Proportional to 553.26, 830.19 and 279.35

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Solution

The fourth proportional to 553.26, 830.19 and 279.35 is: 419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.26 : 830.19 = 279.35 : x
  2. Step 2: Convert to fraction form
    553.26/830.19 = 279.35/x
  3. Step 3: Cross multiply
    553.26x = 830.19 × 279.35
  4. Step 4: Simplify right side
    553.26x = 231,913.58
  5. Step 5: Solve for x
    x = 231,913.58/553.26
  6. Step 6: Final answer
    x = 419.18

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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.