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Finding the Fourth Proportional to 5,558, 7,670.28 and 3,074

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Solution

The fourth proportional to 5,558, 7,670.28 and 3,074 is: 4,242.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,558 : 7,670.28 = 3,074 : x
  2. Step 2: Convert to fraction form
    5,558/7,670.28 = 3,074/x
  3. Step 3: Cross multiply
    5,558x = 7,670.28 × 3,074
  4. Step 4: Simplify right side
    5,558x = 23,578,440.72
  5. Step 5: Solve for x
    x = 23,578,440.72/5,558
  6. Step 6: Final answer
    x = 4,242.25

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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.