Home / 1,399.04-2,098.56-628.64

Finding the Fourth Proportional to 1,399.04, 2,098.56 and 628.64

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Solution

The fourth proportional to 1,399.04, 2,098.56 and 628.64 is: 942.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.04 : 2,098.56 = 628.64 : x
  2. Step 2: Convert to fraction form
    1,399.04/2,098.56 = 628.64/x
  3. Step 3: Cross multiply
    1,399.04x = 2,098.56 × 628.64
  4. Step 4: Simplify right side
    1,399.04x = 1,319,238.76
  5. Step 5: Solve for x
    x = 1,319,238.76/1,399.04
  6. Step 6: Final answer
    x = 942.96

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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.