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Finding the Fourth Proportional to 1,553.55, 2,328.70 and 628.73

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Solution

The fourth proportional to 1,553.55, 2,328.70 and 628.73 is: 942.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.55 : 2,328.70 = 628.73 : x
  2. Step 2: Convert to fraction form
    1,553.55/2,328.70 = 628.73/x
  3. Step 3: Cross multiply
    1,553.55x = 2,328.70 × 628.73
  4. Step 4: Simplify right side
    1,553.55x = 1,464,123.55
  5. Step 5: Solve for x
    x = 1,464,123.55/1,553.55
  6. Step 6: Final answer
    x = 942.44

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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.