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Finding the Fourth Proportional to 2,359.85, 3,539.78 and 628.48

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Solution

The fourth proportional to 2,359.85, 3,539.78 and 628.48 is: 942.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,359.85 : 3,539.78 = 628.48 : x
  2. Step 2: Convert to fraction form
    2,359.85/3,539.78 = 628.48/x
  3. Step 3: Cross multiply
    2,359.85x = 3,539.78 × 628.48
  4. Step 4: Simplify right side
    2,359.85x = 2,224,668.94
  5. Step 5: Solve for x
    x = 2,224,668.94/2,359.85
  6. Step 6: Final answer
    x = 942.72

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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.