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Finding the Fourth Proportional to 1,126.22, 1,554.16 and 628.86

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Solution

The fourth proportional to 1,126.22, 1,554.16 and 628.86 is: 867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.22 : 1,554.16 = 628.86 : x
  2. Step 2: Convert to fraction form
    1,126.22/1,554.16 = 628.86/x
  3. Step 3: Cross multiply
    1,126.22x = 1,554.16 × 628.86
  4. Step 4: Simplify right side
    1,126.22x = 977,349.06
  5. Step 5: Solve for x
    x = 977,349.06/1,126.22
  6. Step 6: Final answer
    x = 867.81

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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.