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Finding the Fourth Proportional to 1,553.63, 2,330.19 and 628.94

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Solution

The fourth proportional to 1,553.63, 2,330.19 and 628.94 is: 943.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.63 : 2,330.19 = 628.94 : x
  2. Step 2: Convert to fraction form
    1,553.63/2,330.19 = 628.94/x
  3. Step 3: Cross multiply
    1,553.63x = 2,330.19 × 628.94
  4. Step 4: Simplify right side
    1,553.63x = 1,465,555.52
  5. Step 5: Solve for x
    x = 1,465,555.52/1,553.63
  6. Step 6: Final answer
    x = 943.31

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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.