Home / 1,126.04-1,553.93-628.78

Finding the Fourth Proportional to 1,126.04, 1,553.93 and 628.78

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Solution

The fourth proportional to 1,126.04, 1,553.93 and 628.78 is: 867.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.04 : 1,553.93 = 628.78 : x
  2. Step 2: Convert to fraction form
    1,126.04/1,553.93 = 628.78/x
  3. Step 3: Cross multiply
    1,126.04x = 1,553.93 × 628.78
  4. Step 4: Simplify right side
    1,126.04x = 977,080.11
  5. Step 5: Solve for x
    x = 977,080.11/1,126.04
  6. Step 6: Final answer
    x = 867.71

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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.