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Finding the Fourth Proportional to 1,101.04, 1,518.96 and 628.88

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Solution

The fourth proportional to 1,101.04, 1,518.96 and 628.88 is: 867.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.04 : 1,518.96 = 628.88 : x
  2. Step 2: Convert to fraction form
    1,101.04/1,518.96 = 628.88/x
  3. Step 3: Cross multiply
    1,101.04x = 1,518.96 × 628.88
  4. Step 4: Simplify right side
    1,101.04x = 955,243.56
  5. Step 5: Solve for x
    x = 955,243.56/1,101.04
  6. Step 6: Final answer
    x = 867.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.