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Finding the Fourth Proportional to 553.70, 830.25 and 508.55

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Solution

The fourth proportional to 553.70, 830.25 and 508.55 is: 762.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.70 : 830.25 = 508.55 : x
  2. Step 2: Convert to fraction form
    553.70/830.25 = 508.55/x
  3. Step 3: Cross multiply
    553.70x = 830.25 × 508.55
  4. Step 4: Simplify right side
    553.70x = 422,219.49
  5. Step 5: Solve for x
    x = 422,219.49/553.70
  6. Step 6: Final answer
    x = 762.54

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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.