Home / 2,173.74-2,999.76-1,289.71

Finding the Fourth Proportional to 2,173.74, 2,999.76 and 1,289.71

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Solution

The fourth proportional to 2,173.74, 2,999.76 and 1,289.71 is: 1,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.74 : 2,999.76 = 1,289.71 : x
  2. Step 2: Convert to fraction form
    2,173.74/2,999.76 = 1,289.71/x
  3. Step 3: Cross multiply
    2,173.74x = 2,999.76 × 1,289.71
  4. Step 4: Simplify right side
    2,173.74x = 3,868,820.47
  5. Step 5: Solve for x
    x = 3,868,820.47/2,173.74
  6. Step 6: Final answer
    x = 1,779.80

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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.