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Finding the Fourth Proportional to 1,553.55, 2,329.20 and 628.65

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Solution

The fourth proportional to 1,553.55, 2,329.20 and 628.65 is: 942.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.55 : 2,329.20 = 628.65 : x
  2. Step 2: Convert to fraction form
    1,553.55/2,329.20 = 628.65/x
  3. Step 3: Cross multiply
    1,553.55x = 2,329.20 × 628.65
  4. Step 4: Simplify right side
    1,553.55x = 1,464,251.58
  5. Step 5: Solve for x
    x = 1,464,251.58/1,553.55
  6. Step 6: Final answer
    x = 942.52

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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.