Home / 2,174.10-3,000.64-1,289.86

Finding the Fourth Proportional to 2,174.10, 3,000.64 and 1,289.86

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Solution

The fourth proportional to 2,174.10, 3,000.64 and 1,289.86 is: 1,780.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.10 : 3,000.64 = 1,289.86 : x
  2. Step 2: Convert to fraction form
    2,174.10/3,000.64 = 1,289.86/x
  3. Step 3: Cross multiply
    2,174.10x = 3,000.64 × 1,289.86
  4. Step 4: Simplify right side
    2,174.10x = 3,870,405.51
  5. Step 5: Solve for x
    x = 3,870,405.51/2,174.10
  6. Step 6: Final answer
    x = 1,780.23

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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.