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Finding the Fourth Proportional to 5,177.88, 7,128 and 4,679.01

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Solution

The fourth proportional to 5,177.88, 7,128 and 4,679.01 is: 6,441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177.88 : 7,128 = 4,679.01 : x
  2. Step 2: Convert to fraction form
    5,177.88/7,128 = 4,679.01/x
  3. Step 3: Cross multiply
    5,177.88x = 7,128 × 4,679.01
  4. Step 4: Simplify right side
    5,177.88x = 33,351,983.28
  5. Step 5: Solve for x
    x = 33,351,983.28/5,177.88
  6. Step 6: Final answer
    x = 6,441.24

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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.