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Finding the Fourth Proportional to 2,174.64, 3,000.87 and 1,230.36

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Solution

The fourth proportional to 2,174.64, 3,000.87 and 1,230.36 is: 1,697.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.64 : 3,000.87 = 1,230.36 : x
  2. Step 2: Convert to fraction form
    2,174.64/3,000.87 = 1,230.36/x
  3. Step 3: Cross multiply
    2,174.64x = 3,000.87 × 1,230.36
  4. Step 4: Simplify right side
    2,174.64x = 3,692,150.41
  5. Step 5: Solve for x
    x = 3,692,150.41/2,174.64
  6. Step 6: Final answer
    x = 1,697.82

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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.