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Finding the Fourth Proportional to 1,126.72, 1,552.93 and 928.14

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Solution

The fourth proportional to 1,126.72, 1,552.93 and 928.14 is: 1,279.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.72 : 1,552.93 = 928.14 : x
  2. Step 2: Convert to fraction form
    1,126.72/1,552.93 = 928.14/x
  3. Step 3: Cross multiply
    1,126.72x = 1,552.93 × 928.14
  4. Step 4: Simplify right side
    1,126.72x = 1,441,336.45
  5. Step 5: Solve for x
    x = 1,441,336.45/1,126.72
  6. Step 6: Final answer
    x = 1,279.23

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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.